noun Biology.

the encysted zygotic stage in the life cycle of some sporozoans.

Origin of oocyst

First recorded in 1870–75; oo- + -cyst
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for oocyst

Historical Examples of oocyst

British Dictionary definitions for oocyst



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

Medicine definitions for oocyst




A thick-walled structure in which sporozoan zygotes develop and that serves to transfer them to new hosts.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.