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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

causal agent, cause, causal agency go
any entity that produces an effect or is responsible for events or results

agent go
a substance that exerts some force or effect

chemical agent go
an agent that produces chemical reactions

wetter, wetting agent, surfactant, surface-active agent go
a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved

emulsifier
a surface-active agent that promotes the formation of an emulsion

noun.substance

1 Subcategories

lecithin go
a yellow phospholipid essential for the metabolism of fats