macrosporangium macrosporange • macrospore · · · Info · Definitions · Synonyms · Characters · · macrosporangium · · Text Latin · · Script 15 · · Length Definitions · · · (noun) a plant structure that produces megaspores. Synonyms: megasporangium. · · Noun Definition 1 Synonyms · · · megasporangium · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075