a cyst containing watery fluid and the larvae of certain tapeworms (esp. genus Echinococcus), found in the bodily tissue, esp. the liver, of many animals
Origin of hydatidClassical Greek hydatis (gen. hydatidos), watery vesicle ; from base of hyd?r, water
of or like such a cyst
- A cyst formed as a result of infestation by larvae of an echinococcus tapeworm.
- The encysted larva of such a tapeworm.
Origin of hydatidGreek hudatis, hudatid-, watery vesicle, from hud&omacron;r, hudat-, water; see wed-1 in Indo-European roots.