基本解释n.[生]三(染色)体性；三(染色)体细胞同根派生 英汉例句用作名词 (n.)An aneuploid state in which a third homologous chromosome is present in addition to the normal autosomal pair is called trisomy.除了正常染色体对以外，还存在有第二种同源染色体的非整倍体状态，被称为三体性。