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- Animalia, kingdom Animalia, animal kingdom
taxonomic kingdom comprising all living or extinct animals - recombinant
a cell or organism in which genetic recombination has occurred - conspecific
an organism belonging to the same species as another organism - carrier
(genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele - pest
any unwanted and destructive insect or other animal that attacks food or crops or livestock etc. - critter
a regional term for `creature' (especially for domestic animals) - creepy-crawly
an animal that creeps or crawls (such as worms or spiders or insects) - darter
a person or other animal that moves abruptly and rapidly - denizen
a plant or animal naturalized in a region - peeper
an animal that makes short high-pitched sounds - homeotherm, homoiotherm, homotherm
an animal that has a body temperature that is relatively constant and independent of the environmental temperature - poikilotherm, ectotherm
an animal whose body temperature varies with the temperature of its surroundings - range animal
any animal that lives and grazes in the grassy open land of western North America (especially horses, cattle, sheep) - vermin
any of various small animals or insects that are pests - varmint, varment
any usually predatory wild animal considered undesirable - scavenger
any animal that feeds on refuse and other decaying organic matter - bottom-feeder, bottom-dweller
a fish that lives and feeds on the bottom of a body of water - bottom-feeder
a scavenger that feeds low on the food chain - bottom lurkers
a fish that lurks on the bottom of a body of water - work animal
an animal trained for and used for heavy labor - beast of burden, jument
an animal such as a donkey or ox or elephant used for transporting loads or doing other heavy work - draft animal
an animal used for pulling heavy loads - pack animal, sumpter
an animal (such as a mule or burro or horse) used to carry loads - domestic animal, domesticated animal
any of various animals that have been tamed and made fit for a human environment - feeder
an animal being fattened or suitable for fattening - feeder
an animal that feeds on a particular source of food - stocker
a domestic animal (especially a young steer or heifer) kept as stock until fattened or matured and suitable for a breeding establishment - hatchling
any recently hatched animal (especially birds) - head
a single domestic animal - migrator
an animal (especially birds and fish) that travels between different habitats at particular times of the year - molter, moulter
an animal (especially birds and arthropods and reptiles) that periodically shed their outer layer (feathers or cuticle or skin or hair) - pet
a domesticated animal kept for companionship or amusement - stayer
a person or other animal having powers of endurance or perseverance - stunt
a creature (especially a whale) that has been prevented from attaining full growth - pollard
a usually horned animal that has either shed its horns or had them removed - marine animal, marine creature, sea animal, sea creature
any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammals - by-catch, bycatch
unwanted marine creatures that are caught in the nets while fishing for another species - amphidiploid
(genetics) an organism or cell having a diploid set of chromosomes from each parent - diploid
(genetics) an organism or cell having the normal amount of DNA per cell - haploid
(genetics) an organism or cell having only one complete set of chromosomes - heteroploid
(genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species - polyploid
(genetics) an organism or cell having more than twice the haploid number of chromosomes - female
an animal that produces gametes (ova) that can be fertilized by male gametes (spermatozoa) - hen
female of certain aquatic animals e.g. octopus or lobster - male
an animal that produces gametes (spermatozoa) that can fertilize female gametes (ova) - adult
any mature animal - young, offspring
any immature animal - orphan
a young animal without a mother - young mammal
any immature mammal - baby
a very young mammal - pup, whelp
young of any of various canines such as a dog or wolf - wolf pup, wolf cub
a young wolf - puppy
a young dog - cub, young carnivore
the young of certain carnivorous mammals such as the bear or wolf or lion - lion cub
a young lion - bear cub
a young bear - tiger cub
a young tiger - kit
young of any of various fur-bearing animals - suckling
a young mammal that has not been weaned - sire
male parent of an animal especially a domestic animal such as a horse - dam
female parent of an animal especially domestic livestock - thoroughbred, purebred, pureblood
a pedigreed animal of unmixed lineage - giant
any creature of exceptional size - vent
external opening of urinary or genital system of a lower vertebrate - animalcule, animalculum
microscopic organism such as an amoeba or paramecium - survivor
an animal that survives in spite of adversity - mutant
an animal that has undergone mutation - carnivore
any animal that feeds on flesh - herbivore
any animal that feeds chiefly on grass and other plants - insectivore
any organism that feeds mainly on insects - acrodont
an animal having teeth consolidated with the summit of the alveolar ridge without sockets - pleurodont
an animal having teeth fused with the inner surface of the alveolar ridge without sockets - form genus
an artificial taxonomic category established on the basis of morphological resemblance for organisms of obscure true relationships especially fossil forms - horn
one of the bony outgrowths on the heads of certain ungulates - antler
deciduous horn of a member of the deer family - tuft
a bunch of feathers or hair - horn
any hard protuberance from the head of an organism that is similar to or suggestive of a horn - crest
a showy growth of e.g. feathers or skin on the head of a bird or other animal - topknot
showy crest or knot of hair or feathers - microorganism, micro-organism
any organism of microscopic size - monad
(biology) a single-celled microorganism (especially a flagellate protozoan) - aerobe
an organism (especially a bacterium) that requires air or free oxygen for life - anaerobe
an organism (especially a bacterium) that does not require air or free oxygen to live - obligate anaerobe
an organism that cannot grow in the presence of oxygen - cross, hybrid, crossbreed
(genetics) an organism that is the offspring of genetically dissimilar parents or stock - dihybrid
a hybrid produced by parents that differ only at two gene loci that have two alleles each - monohybrid
a hybrid produced by crossing parents that are homozygous except for a single gene locus that has two alleles (as in Mendel's experiments with garden peas) - polymorph
an organism that can assume more than one adult form as in the castes of ants or termites - congener, relative, congenator, congeneric
an animal or plant that bears a relationship to another (as related by common descent or by membership in the same genus) - intestinal flora
harmless microorganisms (as Escherichia coli) that inhabit the intestinal tract and are essential for its normal functioning - virus
(virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts - arbovirus, arborvirus
a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions - capsid
the outer covering of protein surrounding the nucleic acid of a virus - virion
(virology) a complete viral particle - adenovirus
any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye - parainfluenza virus
a virus that causes upper respiratory infection (including the common cold and bronchiolitis) - arenavirus
animal viruses belonging to the family Arenaviridae - Junin virus
the RNA virus that causes Argentine hemorrhagic fever - Lassa virus
the RNA virus that causes Lassa fever - lymphocytic choriomeningitis virus
the RNA virus that causes lymphocytic choriomeningitis - Machupo virus
the RNA virus that causes Bolivian hemorrhagic fever - Bunyaviridae
a large family of arboviruses that affect a wide range of hosts (mainly vertebrates and arthropods) - bunyavirus
an animal virus belonging to the family Bunyaviridae - Filoviridae
a family of threadlike RNA viruses that cause diseases in humans and nonhuman primates (monkeys and chimpanzees) - filovirus
animal viruses belonging to the family Filoviridae - Ebola virus
a filovirus that causes Ebola hemorrhagic fever - Marburg virus
a filovirus that causes Marburg disease - Togaviridae
a family of arboviruses carried by arthropods - alphavirus
an arbovirus of the family Togaviridae that can cause a variety of encephalitis in horses - Flaviviridae
a family of arboviruses carried by arthropods - flavivirus
animal viruses belonging to the family Flaviviridae - West Nile virus, West Nile encephalitis virus
the flavivirus that causes West Nile encephalitis - Arenaviridae
a family of arborviruses carried by arthropods - Rhabdoviridae
a family of arborviruses carried by arthropods - vesiculovirus
an animal virus that causes vesicular stomatitis - Reoviridae
a family of arboviruses carried by arthropods - poxvirus
any of a group of viruses that can cause pox diseases in vertebrates - myxoma virus
a poxvirus closely related to smallpox virus - variola virus, smallpox virus
the virus that causes smallpox in humans - variola major, variola major virus
a type of smallpox virus that has a fatality rate of up to 25 percent - variola minor, variola minor virus
a type of smallpox virus that has a fatality rate of about 1 percent - tobacco mosaic virus, TMV
the widely studied plant virus that causes tobacco mosaic - viroid, virusoid
the smallest of viruses - bacteriophage, phage
a virus that is parasitic (reproduces itself) in bacteria - coliphage
a bacteriophage that infects the bacterium Escherichia coli - typhoid bacteriophage
a bacteriophage specific for the bacterium Salmonella typhi - plant virus
a plant pathogen that is a virus consisting of a single strand of RNA - animal virus
an animal pathogen that is a virus - hepadnavirus
a group of animal DNA viruses including viruses of ducks and woodchucks and squirrels and others as well as the virus causing hepatitis B in humans - retrovirus
any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA) - human T-cell leukemia virus-1, HTLV-1
retrovirus causing T-cell leukemia - human immunodeficiency virus, HIV
the virus that causes acquired immune deficiency syndrome (AIDS) - myxovirus
any of a group of RNA viruses including those that cause influenza and mumps - orthomyxovirus
a group of viruses including those causing influenza - paramyxovirus
a group of viruses including those causing mumps and measles - respiratory syncytial virus
a paramyxovirus that forms syncytia in tissue culture and that is responsible for severe respiratory diseases such as bronchiolitis and bronchial pneumonia (especially in children) - picornavirus
a group of single-strand RNA viruses with a protein coat - poliovirus
the virus causing poliomyelitis - hepatitis A virus
the virus causing hepatitis A - enterovirus
any of a group of picornaviruses that infect the gastrointestinal tract and can spread to other areas (especially the nervous system) - coxsackievirus, Coxsackie virus
enterovirus causing a disease resembling poliomyelitis but without paralysis - echovirus
any of a group of viruses associated with various diseases including viral meningitis and mild respiratory disorders and diarrhea in newborn infants - rhinovirus
any of a group of picornaviruses that are responsible for many upper respiratory infections - herpes, herpes virus
any of the animal viruses that cause painful blisters on the skin - herpes simplex, herpes simplex virus
a herpes virus that affects the skin and nervous system - herpes simplex 1, HS1, HSV-1, HSV-I
a herpes virus that causes oral herpes - herpes simplex 2, HS2, HSV-2, HSV-II
a herpes virus that can cause genital herpes - herpes zoster, herpes zoster virus
a herpes virus that causes shingles - herpes varicella zoster, herpes varicella zoster virus
a herpes virus that causes chickenpox and shingles - Epstein-Barr virus, EBV
the herpes virus that causes infectious mononucleosis - cytomegalovirus, CMV
any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects - varicella zoster virus
the member of the herpes virus family that is responsible for chickenpox - papovavirus
any of a group of animal viruses associated with or causing papillomas or polyomas - human papilloma virus
any of a group of papovaviruses associated with genital or oral carcinomas or a group associated with benign genital tumors - polyoma, polyoma virus
a virus the can initiate various kinds of tumors in mice - rhabdovirus
any of a group of arboviruses including those causing rabies - lyssavirus
a neurotropic non-arbovirus of the family Rhabdoviridae that causes rabies - reovirus
any of a group of non-arboviruses including the rotavirus causing infant enteritis - rotavirus
the reovirus causing infant enteritis - parvovirus, parvo
any of a group of viruses containing DNA in an icosahedral protein shell and causing disease in dogs and cattle - slow virus
a virus that remains dormant in the body for a long time before symptoms appear - onion yellow-dwarf virus
the virus that produces stunting and yellowing of the leaves of onion plants - potato yellow-dwarf virus
the virus that produces stunting and yellowing of the leaves of potato plants - Monera, kingdom Monera, Prokayotae, kingdom Prokaryotae
prokaryotic bacteria and blue-green algae and various primitive pathogens - moneran, moneron
organisms that typically reproduce by asexual budding or fission and whose nutritional mode is absorption or photosynthesis or chemosynthesis - animal order
the order of animals - protoctist order
the order of protoctists - division Archaebacteria
in some classifications considered a kingdom - archaebacteria, archaebacterium, archaeobacteria, archeobacteria
considered ancient life forms that evolved separately from bacteria and blue-green algae - methanogen
archaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methane - halophile, halophil
archaebacteria requiring a salt-rich environment for growth and survival - halobacteria, halobacterium, halobacter
halophiles in saline environments such as the Dead Sea or salt flats - thermoacidophile
archaebacteria that thrive in strongly acidic environments at high temperatures - bacteria, bacterium
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission - acidophil, acidophile
an organism that thrives in a relatively acid environment - probiotic, probiotic bacterium, probiotic microflora, probiotic flora
a beneficial bacterium found in the intestinal tract of healthy mammals - bacteroid
a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants) - bacillus, B
aerobic rod-shaped spore-producing bacterium - Bacillus anthracis, anthrax bacillus
a species of bacillus that causes anthrax in humans and in animals (cattle and swine and sheep and rabbits and mice and guinea pigs) - Bacillus subtilis, Bacillus globigii, grass bacillus, hay bacillus
a species of bacillus found in soil and decomposing organic matter - Yersinia pestis
a bacillus bacterium that causes the plague - coccus, cocci
any spherical or nearly spherical bacteria - coccobacillus
a bacterial cell intermediate in morphology between a coccus and a bacillus - Brucella
an aerobic Gram-negative coccobacillus that causes brucellosis - spirillum, spirilla
any flagellated aerobic bacteria having a spirally twisted rodlike form - Heliobacter, genus Heliobacter
a genus of helical or curved or straight aerobic bacteria with rounded ends and multiple flagella - Heliobacter pylori, H. pylori
the type species of genus Heliobacter - bacteria order
an order of bacteria - bacteria family
a family of bacteria - bacteria genus
a genus of bacteria - bacteria species
a species of bacteria - Pseudomonas pyocanea
a species of aerobic bacteria - Aerobacter, genus Aerobacter
aerobic bacteria widely distributed in nature - Aerobacter aerogenes
a species of Gram-negative aerobic bacteria that produce gas and acid from sugars and are sometimes involved in the souring of milk - Rhizobiaceae, family Rhizobiaceae
a small family of rod-shaped bacteria - Rhizobium, genus Rhizobium
the type genus of Rhizobiaceae - Agrobacterium, genus Agrobacterium
small motile bacterial rods that can reduce nitrates and cause galls on plant stems - Agrobacterium tumefaciens
the bacteria that produce crown gall disease in plants - division Eubacteria
one-celled monerans having simple cells with rigid walls and (in motile types) flagella - eubacteria, eubacterium, true bacteria
a large group of bacteria having rigid cell walls