hydatid Meaning, Definition & Usage

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

Gr. , , a watery vesicle under the upper eyelid, fr. "y`dwr, "y`datos, water: cf. F. hydatide.

(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 Coenurus. See these words in the Vocabulary.