Hypertext Webster Gateway: "reagent"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Reagent \Re*a"gent\, n. (Chem.)
A substance capable of producing with another a reaction,
especially when employed to detect the presence of other
bodies; a test.
From WordNet (r) 1.7 (wn)
reagent
n : a chemical agent for use in chemical reactions
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