veratrum noun. 
[vǝ'reɪtrǝm] L16.[Latin.]Any of various tall acrid plants constituting the genus 
Veratrum, of the lily family, which have broad leaves and clustered greenish or whitish flowers (also called 
false hellebore); 
esp. the European white hellebore, 
Veratrum album, and the N. American 
V. viride. Also, the poisonous rhizome of any of these plants. 
 [TahlilGaran] English Dictionary ▲