- any of a class of plant compounds that accumulate at the site of invading microorganisms and confer resistance to disease.
Origin of phytoalexin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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