| helleborine | (n) any of various orchids of the genus Epipactis |
| helleborine | (n) any of several orchids of the genus Cephalanthera |
| Helleborin | n. (Chem.) 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 |