Meaning of hirudin

hir•u•din

Pronunciation: (hir'yu-din, hir'u-, hi-rd'n), [key]
— n.
  1. a gray or white, water-soluble acidic polypeptide obtained from the buccal gland of leeches, used in medicine chiefly as an anticoagulant.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.