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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

group, radical, chemical group go
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

nitrite
the radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid)

noun.substance

1 Subcategories

sodium nitrite go
nitrite used to preserve and color food especially in meat and fish products