What's the difference between hellebore and helleborin?

Hellebore

Definition:

(n.) A genus of perennial herbs (Helleborus) of the Crowfoot family, mostly having powerfully cathartic and even poisonous qualities. H. niger is the European black hellebore, or Christmas rose, blossoming in winter or earliest spring. H. officinalis was the officinal hellebore of the ancients.
(n.) Any plant of several species of the poisonous liliaceous genus Veratrum, especially V. album and V. viride, both called white hellebore.

Example Sentences:

(1) The authors are of the opinion that the bradycardia is due to a reflexively increased vagal tonus but the other changes of the ECG are caused by the direct toxic action of the hellebore alkaloids on the myocardium.
(2) Even for these, pyrethrum, nicotine, rotenone, hellebore, ryania, and sabadilla, there is a paucity of information on mammalian toxicology and environmental effects.
(3) We present six cases of poisoning due to ingestion of Veratrum viride (false hellebore) and review the physiology of veratrum alkaloids.
(4) In 12 patients, 20 to 80 years of age, 6 men and 6 women, with acute hellebore (Veratrum album) intoxication the electrocardiographic changes were studied.
(5) Major results of these studies are presented for the following plants: Garlic, Geranium; Hellebore; Mistletoe; Olive; Valerian; Hawthorn; Pseucedanum arenarium; Periwinkle; Fumitory.
(6) The White Hellebore (Veratrum Album L.) and the Yellow Gentian (Gentiana Lutea L.) often grow side by side in the fields; it is easy to confuse the two plants before they flower if one is not a botanist.
(7) Five cases of acute accidental poisoning with White Hellebore are reported.

Definition:

(n.) A poisonous glucoside found in several species of hellebore, and extracted as a white crystalline substance with a sharp tingling taste. It possesses the essential virtues of the plant; -- called also elleborin.

Example Sentences:

(1) the mannose-specific lectins from the orchid species Cymbidium hybrid (CA), Epipactis helleborine (EHA) and Listera ovata (LOA) were highly inhibitory to human immunodeficiency virus type 1 (HIV-1) and type 2 (HIV-2) in MT-4, and showed a marked anti-human cytomegalovirus (CMV), respiratory syncytial virus (RSV) and influenza A virus activity in HEL, HeLa and MDCK cells, respectively.