小しょう胞ほう子しMeanings1nounmicrosporebotanyBotanical term for the smaller spore in heterosporous plants, which develops into a male gametophyte.小しょう胞ほう子しは雄ゆう性せい配はい偶ぐう体たいに成せい長ちょうする。The microspore develops into a male gametophyte.