noun Biochemistry.

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

Origin of phytoalexin

First recorded in 1945–50; phyto- + alexin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for phytoalexin



botany any of a group of substances produced by plants that inhibit the growth of pathogenic fungi that infect them

Word Origin for phytoalexin

C20: from phyto- + Greek alexein to ward off
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012