a cyst with watery contents that is produced in humans and animals by a tapeworm in the larval state; cysticerus.
a cystic vestige of an embryonic feature.


Also hy·da·tid·i·nous. of or relating to a hydatid.
containing or affected by hydatids.

Nearby words

  1. hybridoma,
  2. hybris,
  3. hyd.,
  4. hydantoin,
  5. hydathode,
  6. hydatid cyst,
  7. hydatid disease,
  8. hydatid fremitus,
  9. hydatid thrill,
  10. hydatidiform

Origin of hydatid

1675–85; < Greek hydatid- (stem of hydatís) watery vesicle

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

Examples from the Web for hydatid

British Dictionary definitions for hydatid



a large bladder containing encysted larvae of the tapeworm Echinococcus: causes serious disease in man
Also called: hydatid cyst a sterile fluid-filled cyst produced in man and animals during infestation by Echinococcus larval forms

Word Origin for hydatid

C17: from Greek hudatis watery vesicle, from hudōr, hudat- water

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 hydatid




A hydatid cyst.
The encysted larva of Echinococcus granulosus.
An abnormal vascular structure that is usually filled with fluid.

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