- vesicle, cyst - a small anatomically normal sac or bladderlike structure (especially one containing fluid)
--1 is a kind of sac
--1 has particulars:lacrimal sac, tear sac, dacryocyst; Golgi body, Golgi apparatus, Golgi complex, dictyosome; blister, bulla, bleb; follicle; liposome; seminal vesicle