[hir-yuh-din, hir-uh-, hi-rood-n]


a gray or white, water-soluble acidic polypeptide obtained from the buccal gland of leeches, used in medicine chiefly as an anticoagulant.

Nearby words

  1. hirsute,
  2. hirsutism,
  3. hirsutulous,
  4. hirtellous,
  5. hirudicide,
  6. hirudinea,
  7. hirudinean,
  8. hirudinoid,
  9. hirudo,
  10. hirundine

Origin of hirudin

First recorded in 1900–05; formerly trademark

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for hirudin



med an anticoagulant extracted from the mouth glands of leeches

Word Origin for hirudin

C20: from Latin hirudin-, hirudo leech + -in

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for hirudin


[hĭ-rōōdn, hîrə-dən, -yə-]


A substance extracted from the salivary glands of leeches and used as an anticoagulant.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.