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English Dictionary | phytoalexin

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phytoalexin

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WordReference Random House Unabridged Dictionary of American English © 2026

phy•to•a•lex•in n. [Biochem.]

Biochemistry, Botanyany of a class of plant compounds that accumulate at the site of invading microorganisms and confer resistance to disease.

phyto- + alexin 1945–50

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