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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

thing go
a separate and self-contained entity

unit, building block go
a single undivided natural thing occurring in the composition of something else

molecule go
(physics and chemistry) the simplest structural unit of an element or compound

macromolecule, supermolecule go
any very large complex molecule

lipid, lipide, lipoid go
an oily organic compound insoluble in water but soluble in organic solvents

phospholipid
any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base

noun.substance

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