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oocyst

[ oh-uh-sist ]

noun

, Biology.
  1. the encysted zygotic stage in the life cycle of some sporozoans.


oocyst

/ ˈəʊəˌsɪst /

noun

  1. an encysted zygote of sporozoan protozoans that undergoes sporogony to produce infective sporozoites
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of oocyst1

First recorded in 1870–75; oo- + -cyst
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Example Sentences

Immediately after the formation of the antheridia new productions show themselves, both around the oocyst and within it.

The order Coccidiidea is divided into four families, characterized by the number of sporocysts (if any) found in the oocyst.

In one case (Coccidium mitrarium), the oocyst itself, instead of being spherical, is curiously shaped like a mitre.

No sporozoites are formed in the oocyst, the sporozoites being unenclosed (gymnospores).

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ooblastoocyte