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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

protoctist go
any of the unicellular protists

protozoan, protozoon go
any of diverse minute acellular or unicellular organisms usually nonphotosynthetic

ciliate, ciliated protozoan, ciliophoran go
a protozoan with a microscopic appendage extending from the surface of the cell

paramecium, paramecia
any member of the genus Paramecium

noun.animal

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