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megasporangium

[meg-uh-spaw-ran-jee-uh m, -spoh-]
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noun, plural meg·a·spo·ran·gi·a [meg-uh-spaw-ran-jee-uh, -spoh-] /ˌmɛg ə spɔˈræn dʒi ə, -spoʊ-/. Botany.
  1. a sporangium containing megaspores.
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Origin of megasporangium

First recorded in 1885–90; mega- + sporangium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for megasporangia

megasporangium

noun plural -gia (-dʒɪə)
  1. the structure in certain spore-bearing plants in which the megaspores are formed: corresponds to the ovule in seed plantsCompare microsporangium
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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

megasporangia in Science

megasporangium

[mĕg′ə-spə-rănjē-əm]
Plural megasporangia
  1. A plant structure in which megaspores are formed, such as those of the female cones of pines.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.