megasporophyll

[meg-uh-spawr-uh-fil, -spohr-]

meg·a·spo·ro·phyll

[meg-uh-spawr-uh-fil, -spohr-]
noun Botany.
a sporophyll producing megasporangia only.

Origin:
1895–1900; mega- + sporophyll
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Megasporophyll is always a great word to know.
So is multicellular diploid. Does it mean:
organisms having pairs of homologous chromosomes
plants with the vascular tissues xylem and phloem for transporting water and nutrients
Collins
World English Dictionary
megasporophyll (ˌmɛɡəˈspɔːrəfɪl)
 
n
Compare microsporophyll a leaf on which the megaspores are formed: corresponds to the carpel of a flowering plant
 
[C20: from mega- + sporophyll]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
megasporophyll   (měg'ə-spôr'ə-fĭl')  Pronunciation Key 
A leaflike structure that bears megasporangia.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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