Also found in: Medical, Encyclopedia, Wikipedia.
Related to oocyst: cryptosporidium
A thick-walled structure that contains the zygote of an apicomplexan parasite and releases the infective sporozoites.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Zoology) an encysted zygote of sporozoan protozoans that undergoes sporogony to produce infective sporozoites
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the encysted zygotic stage in the life cycle of some sporozoans.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.