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| meg·a·spo·ran·gi·um [ mèggə spə ránjee əm ] (plural meg·a·spo·ran·gi·a [ mèggə spə ránjee ə ] or meg·a·spo·ran·gi·ums) |
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spore-producing organ: an organ in seed plants and ferns that produces large spores megaspores from which female gametophytes develop
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