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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

sugar, carbohydrate, saccharide go
an essential structural component of living cells and source of energy for animals

monosaccharide, monosaccharose, simple sugar go
a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars

ketose
any monosaccharide sugar that contains a ketone group or its hemiacetal

noun.substance

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