n.
Pronunciation: - ˌ sist
Function: noun
Etymology: International Scientific Vocabulary
Date: 1861
1 : a case or cyst secreted by some sporozoans preliminary to sporogony also : a sporozoan encysted in such a case
2 : a saccular body that is the first asexual reproductive form of a digenetic trematode, develops from a miracidium, and buds off cells from its inner surface which develop into rediae