from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A resting cell that produces asexual plant spores.
- n. A protective case or cyst in which sporozoites develop and from which they are transferred to different hosts.
- n. A sporozoite enclosed in such a case; an encysted sporozoan.
- n. A saclike larval stage in many trematode worms.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A cyst that develops from a sporoblast and from which sporozoites develop
- n. A larval stage in many trematode worms
from the GNU version of the Collaborative International Dictionary of English
- n. An asexual zooid, usually forming one of a series of larval forms in the agamic reproduction of various trematodes and other parasitic worms. The sporocyst generally develops from an egg, but in its turn produces other larvæ by internal budding, or by the subdivision of a part or all of its contents into a number of minute germs. See redia.
- n. Any protozoan when it becomes encysted and produces germs by sporulation.
from The Century Dictionary and Cyclopedia
- n. In zoology: The cyst, sac, or capsule which is developed in the process of sporular encystment; any unicellular organism which becomes encysted and proceeds to sporulation.
- n. A cyst or sac containing spores or germs, such as is developed in the larval state of certain flukes, or trematoid worms, as Bucephalus; this state of such worms; a redia containing cercariæ. See redia, and cuts under cercaria, germarium, and Trematoda.
- n. In botany, a unicellular alga which, usually by a process of division, produces only asexual spores: in contrast with sporangium, which is usually limited to multi-cellular organs producing asexual spores.
Sorry, no etymologies found.
The eggs hatch into a ciliated miracidium which actively seeks out the first host, a gastropod, penetrating its skin and metamorphosing into a saclike sporocyst.
The period of development varies from ten to twenty weeks; each sporocyst may give rise to from five to eight _redia_ and each redia to from twelve to twenty _cercaria_.
The _sporocyst_, as it is now called, develops into a third generation known as _redia_ which escape from the cyst.