You searched for: “phytoalexin
phytoalexin
Any substance that is produced by plant tissues in response to contact with a parasite and specifically inhibits the growth of that parasite.

The term was originally defined with regard to fungal parasites only, but in 1956 it was extended to cover all parasites [According to the Oxford English Dictionary].

This entry is located in the following units: alexo-, alex-, alexi- (page 1) phyto-, phyt-, -phyte (page 12)