from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A cyst formed as a result of infestation by larvae of an echinococcus tapeworm.
  • noun The encysted larva of such a tapeworm.

from The Century Dictionary.

  • noun In pathology, a cyst with aqueous contents found in the tissue, formed by a tænia in its larval state, especially in man by Tænia echinococcus.
  • noun In zoology, the encysted larval state of the wandered scolex of a tapeworm, especially of Tœnia echinococcus.
  • In zoology, encysted; being in the cystic state, as the larva of a tapeworm when it is a cysticercus, cœnure, or echinococcus.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) A membranous sac or bladder filled with a pellucid fluid, found in various parts of the bodies of animals, but unconnected with the tissues. It is usually formed by parasitic worms, esp. by larval tapeworms, as Echinococcus and Cœnurus. See these words in the Vocabulary.
  • noun (Anat.) one of the small pedunculated bodies found between the testicle and the head of the epididymis, and supposed to be a remnant of the Müllerian duct.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A cyst due to infection by larvae of some species of the tapeworm Echinococcus

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun cyst filled with liquid; forms as a result of infestation by tapeworm larvae (as in echinococcosis)


from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek hudatis, hudatid-, watery vesicle, from hudōr, hudat-, water; see wed- in Indo-European roots.]


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  • The resulting infection in man is known as hydatid disease and is very hard to treat.

    Chapter 2 1999

  • In searching, he had recalled another, rarer case: one of a hydatid cyst in the subcutaneous tissue of the thigh.

    Ultima Thule 2003

  • She has been extensively examined, and we have found that she suffered from a range of diseases including sand pneumoconiosis, a hydatid cyst in the lung, strongyloides and schistosomiasis (both parasitic diseases), and arthritis.

    Under Wraps: Rosalie David in Conversation 2001

  • Hamilton Fairley, already a man of standing in tropical medicine, was available and worked with Kellaway for two years on hydatid disease and snake venoms.

    The Walter and Eliza Hall Institute 1997

  • Harold Dew, later long-time Professor of Surgery at the University of Sydney, collaborated in the study of hydatid disease.

    The Walter and Eliza Hall Institute 1997

  • These cysts can be confused with hydatid cysts (see below).

    Chapter 2 1999

  • It is important where hydatid cysts are found in the domestic animals that dogs are kept away from carcasses and that household dogs are regularly treated with praziquantel.

    Chapter 2 1999

  • A recent CAT scan of the liver confirms the large hydatid cyst

    ANC Daily News Briefing 1996

  • Knobel said a large hydatid liver cyst was detected in

    ANC Daily News Briefing 1996

  • It was common for people to have several hydatid cysts.

    ANC Daily News Briefing 1996


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