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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
an agent that produces chemical reactions

noun.substance

8 Subcategories

active, active agent go
chemical agent capable of activity
reagent go
a chemical agent for use in chemical reactions
drier, desiccant, drying agent, siccative go
a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture)
oxidant, oxidizer, oxidiser, oxidizing agent go
a substance that oxidizes another substance
reducer, reducing agent, reductant go
a substance capable of bringing about the reduction of another substance as it itself is oxidized
scavenger go
a chemical agent that is added to a chemical mixture to counteract the effects of impurities
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
vesicant, vesicatory go
a chemical agent that causes blistering (especially mustard gas)