Pronunciation: mi'ra-sid'e-um, -a
The ciliated first-stage larva of a trematode that emerges from the egg and must penetrate into the tissues of an appropriate intermediate host snail if it is to continue its life cycle; followed by development into a mother sporocyst and by production of a number of offspring of successive larval generations.
[G. meirakidion, boy]
See Also: sporocyst1
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.