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Portuguese
megásporo
Spanish
macróspora
Catalan
megàspora
Wikidata

A type of spore that is present in heterosporous plants; large spore, germinates into a female gametophyte, which produces egg cells.

      megásporo
      1
      The nucellus is a cellular tissue enveloping one large cell, the embryo-sac or macrospore.
      Encyclopaedia Britannica, 11th Edition, "Andros, Sir Edmund" to ...
      2
      But the formation of the macrospore or embryo-sac is simpler than the corresponding process in cryptogams.
      Scientific American Supplement, No. 531, March 6, 1886
      1
      The megaspore mother cells develop just after pollination in early May and mature in mid-late June.
      Pubmed