減数分裂

(1)understatement for rhetorical effect (especially when expressing an affirmative by negating its contrary); "saying `I was not a little upset' when you mean `I was very upset' is an example of litotes"

(2)修辞的効果の控えめな表現（特に相反するものを否定することによって肯定を表現するとき）

(3)(genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)

(4)有性生殖生物での生殖細胞を作り出す細胞分裂

(5)核が半分の染色体数をもつ4つの核に分裂する（動物の配偶子や植物の胚種となる）