Topic Navigator

Noun Tree | Nouns Groups | Verb Groups | Search

Parent Categories

entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

object, physical object go
a tangible and visible entity

whole, unit go
an assemblage of parts that is regarded as a single entity

living thing, animate thing go
a living (or once living) entity

organism, being go
a living thing that has (or can develop) the ability to act or function independently

microorganism, micro-organism go
any organism of microscopic size

bacteria, bacterium go
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission

nitrobacterium
any of the bacteria in the soil that take part in the nitrogen cycle

noun.animal

2 Subcategories

nitrate bacterium, nitric bacterium go
any of the nitrobacteria that oxidize nitrites into nitrates
nitrite bacterium, nitrous bacterium go
any of the nitrobacteria that oxidize ammonia into nitrites