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Webster 1913 Edition

Noun.

[Prob. fr. Sp.

yerba

herb, OSp., the poison of the veratrum.]

(Chem.)

A poisonous alkaloid resembling veratrine, and found with it in white hellebore (

Veratrum album

); – called also

jervina

jervine ‎(countable and uncountable, plural jervines)

(organic chemistry) A steroidal alkaloid, obtained from plants of the genus Veratrum, that is teratogenic