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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

moneran, moneron go
organisms that typically reproduce by asexual budding or fission and whose nutritional mode is absorption or photosynthesis or chemosynthesis

archaebacteria, archaebacterium, archaeobacteria, archeobacteria go
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

noun.animal

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