macrosporangium

Definitions

  • WordNet 3.6
    • n macrosporangium a plant structure that produces megaspores
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Webster's Revised Unabridged Dictionary
    • n Macrosporangium (Bot) A sporangium or conceptacle containing only large spores; -- opposed to microsporangium. Both are found in the genera Selaginella Isoctes, and Marsilia, plants remotely allied to ferns.
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Century Dictionary and Cyclopedia
    • n macrosporangium A sporangium containing macrospores. It is homologous with the ovule of flowering plants. Also called goniotheca.
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Chambers's Twentieth Century Dictionary
    • n Macrosporangium a sporangium containing macrospores
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Etymology

Webster's Revised Unabridged Dictionary
NL. See Macro-, and Sporangium
Chambers's Twentieth Century Dictionary
Gr. makros, long, spora, a seed.

Usage

In literature:

We have already examined in some detail the structure of the macrosporangium or ovule.
"Elements of Structural and Systematic Botany" by Douglas Houghton Campbell
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