from
The Collaborative International Dictionary of English v.0.48
Hydatid \Hy"da*tid\, n. [Gr. ?, ?, a watery vesicle under the
upper eyelid, fr. "y`dwr, "y`datos, water: cf. F. hydatide.]
(Zool.)
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 C[oe]nurus. See these words in the Vocabulary.
[1913 Webster]
{Hydatid of Morgagni} (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
M["u]llerian duct.
[1913 Webster]