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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

animal, animate being, beast, brute, creature, fauna go
a living organism characterized by voluntary movement

chordate go
any animal of the phylum Chordata having a notochord or spinal column

vertebrate, craniate go
animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium

reptile, reptilian go
any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms

diapsid, diapsid reptile go
reptile having a pair of openings in the skull behind each eye

snake, serpent, ophidian go
limbless scaly elongate reptile

viper go
venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw

pit viper
New World vipers with hollow fangs and a heat-sensitive pit on each side of the head

noun.animal

4 Subcategories

copperhead, Agkistrodon contortrix go
common coppery brown pit viper of upland eastern United States
water moccasin, cottonmouth, cottonmouth moccasin, Agkistrodon piscivorus go
venomous semiaquatic snake of swamps in southern United States
rattlesnake, rattler go
pit viper with horny segments at the end of the tail that rattle when shaken
fer-de-lance, Bothrops atrops go
large extremely venomous pit viper of Central America and South America