Dictionary.net

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.

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.

Applied to an order of intestinal worms.

Any vesicle or sac filled with a clear watery-like fluid, and containing encysted stages of the larval tapeworms.

This name was long given to every encysted tumour which contained an aqueous and transparent fluid. Many pathologists subsequently applied it to vesicles, softer than the tissue of membranes, more or less transparent, which are developed within organs, but without adhering to their tissues. It is by no means clear that these formations are really entozoa. They have been found in various parts of the body; sometimes in the uterus, occasioning signs nearly similar to those of pregnancy, but being sooner or later expelled. The expulsion is generally attended with more or less hemorrhage. See Acephalocystis. Hydatis, Aquula, Phlyctaenula, Verruca Palpebrarum, Milium, also, meant a small, transparent tumour of the eyelids.-Galen, C. Hoffmann.

A cyst formed by the larva of Taenia.

An echinococcus or the vesicle containing it.

A name for certain bulbous cystlike remnants of atrophied embryonic structures, one of which, the Hydatid of Morgagni, hangs by a pedicle from the fimbriated extremity of the oviduct and another from the epoophoron.