胞嘧啶bāo mì dìngbaomidingcytosine nucleotide (C, pairs with guanine G 鳥嘌呤|鸟嘌呤 in DNA and RNA)Characters in this word啶in chemistry, -dine嘧in chemistry, -mi as in pyramidine胞womb, placenta, fetal membraneStudy it in Yanamino