phytoalexin

noun
phy·to·alex·in | \ˌfī-tō-ə-ˈlek-sən \

Definition of phytoalexin 

: any of various antimicrobial chemical substances produced by plants to combat infection by a pathogen (such as a fungus)

First Known Use of phytoalexin

1949, in the meaning defined above

History and Etymology for phytoalexin

International Scientific Vocabulary phyt- + alexin substance combating infection, from Greek alexein to ward off, protect; akin to Sanskrit rakṣati he protects

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The first known use of phytoalexin was in 1949

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