[hel-uh-bawr-ee-in, -bohr-]
  1. a yellow, crystalline, water-soluble, poisonous solid, C37H56O18, obtained from the rhizome and root of certain hellebores, and used in medicine chiefly as a heart stimulant.

Origin of helleborein

First recorded in 1870–75; hellebore + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of helleborein