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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

microorganism, micro-organism go
any organism of microscopic size

virus
(virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts

noun.animal

7 Subcategories

arbovirus, arborvirus go
a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions
bacteriophage, phage go
a virus that is parasitic (reproduces itself) in bacteria
plant virus go
a plant pathogen that is a virus consisting of a single strand of RNA
animal virus go
an animal pathogen that is a virus
slow virus go
a virus that remains dormant in the body for a long time before symptoms appear
tumor virus go
a cell-free filtrate held to be a virus responsible for a specific neoplasm
vector go
(genetics) a virus or other agent that is used to deliver DNA to a cell