trifunctional

adjective
tri·​func·​tion·​al | \ ˌtrī-ˈfəŋk-shən-ᵊl How to pronounce trifunctional (audio) \

Medical Definition of trifunctional

: of, relating to, or being a compound with three sites in the molecule that are highly reactive (as in polymerization) a trifunctional amino acid

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