English word oocyst comes from English cyst, English oo- (Relating to eggs or ova.)
| Dictionary entry | Language | Definition |
|---|---|---|
| cyst | English (eng) | (medicine) Of or pertaining to the urinary bladder or gall bladder (in compounds).. A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ. |
| oo- | English (eng) | Relating to eggs or ova. |
| oocyst | English (eng) | (biology) A thick-walled structure of a parasitic protozoan, that develops into sporozoite. [from 20th c.]. (mycology) A reproductive cell in certain fungi. [from 19th c.]. |