hydatid
/ˈhaɪdətɪd/noun
1- Medicine a cyst containing watery fluid【医】泡, 囊。
1.1
- such a cyst formed by and containing a tapeworm larva（由绦虫幼虫形成的）包虫囊。
1.2
- a tapeworm larva绦虫幼虫。
词源
late 17th cent.: from modern Latin hydatis, from Greek hudatis, hudatid- 'watery vesicle', from hudōr, hudat- 'water'.