phytoalexin

phytoalexin

[fahy-toh-uh-lek-sin]
noun Biochemistry.
any of a class of plant compounds that accumulate at the site of invading microorganisms and confer resistance to disease.

Origin:
1945–50; phyto- + alexin

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World English Dictionary
phytoalexin (ˌfaɪtəʊəˈlɛksɪn)
 
n
botany any of a group of substances produced by plants that inhibit the growth of pathogenic fungi that infect them
 
[C20: from phyto- + Greek alexein to ward off]

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