/huy"deuh tid/ , Pathol.
n.
1. a cyst with watery contents that is produced in humans and animals by a tapeworm in the larval state; cysticerus.
2. a cystic vestige of an embryonic feature.
adj.
3. Also, hydatidinous . of or pertaining to a hydatid.
4. containing or affected by hydatids.
[ 1675-85; hydatid- (s. of hydatís ) watery vesicle ]