Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to megasporophyll: microsporophyll, megasporangium


A leaflike structure that bears megasporangia.
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.


(Botany) a leaf on which the megaspores are formed: corresponds to the carpel of a flowering plant. Compare microsporophyll
[C20: from mega- + sporophyll]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌmɛg əˈspɔr ə fɪl, -ˈspoʊr-)

a sporophyll producing megasporangia only.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.megasporophyll - in non-flowering plants, a sporophyll that bears only megasporangiamegasporophyll - in non-flowering plants, a sporophyll that bears only megasporangia
sporophyl, sporophyll - leaf in ferns and mosses that bears the sporangia
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
norstogii show a light brown to ochre tomentum on the megasporophyll lobule near the horns, whereas C.
On another occasion we observed termites excavating galleries in the megasporophyll and seed sarcotesta tissues of a female C.
moorei plants produce seeds on a large strobilus (megasporophyll) which typically contain 300-360 seeds (Jones 1993:44; Low 1991:138; Rolf Kyburz; pets.
Other, younger, species of Cordianthus exhibited reduction from the above condition in that the telome system, composed of mesomes and telomes (termed by Florin a "megasporophyll") was much shortened, unbranched, and bore but one ovule at the apex.
microsporophylls, pectinate megasporophyll apices, glabrous ovules, and
each megasporophyll with a proximal stalked portion bearing 2-10
Isoetes is heterosporous, with each leaf a potential microsporophyll or megasporophyll. There are scattered reports in the literature of the odd sporangium containing both microspores and megaspores, but this is rare and apparently insignificant.
The Taxaceae aril is the fleshy part of the megasporophyll and the apex of the axillary shoot (Chamberlain, 1935; Coulter & Chamberlain, 1917; Florin, 1954; Wilde, 1944).
In Encephalartos and Stangeria, male and female cones (referred to as microsrobili and megastrobili, respectively) typically consist of a central axis to which numerous tightly-packed cone scales (termed microsporophylls in males and megasporophylls in females) are attached (Fig.
leaflike, loosely arranged, multiovulate megasporophylls, and it is
exposed to light entering between megasporophylls, from April to August.