mi·cro·spo·ran·gi·um /ˌmaɪkrospəˈrænʤiəm/
小孢子囊
Mi·cro·spo·ran·gi·um n. Bot. A sporangium or conceptacle containing only very minute spores. Cf. Macrosporangium.
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microsporangium
n : a plant structure that produces microspores
[also: microsporangia (pl)]