mer·o·zo·ite (m?r??-z???t)n. Any of the cells of an apicomplexan parasite that arise following multiple asexual fission and may enter either the asexual or sexual phase of the life cycle.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.merozoite (?m?r???z??a?t) n (Zoology) any of the cells formed by fission of a schizont during the life cycle of sporozoan protozoans, such as the malaria parasite. Compare trophozoite[C20: from mero- + zo(o) + -ite1]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014mer?o?zo?ite (?m?r ??zo? a?t) n. (in the asexual reproduction of certain sporozoans) a cell developed from a schizont that parasitizes a red blood cell in the host. [1895?1900; mero- + -zo(on) + -ite1] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.