a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape
同义词：kinetochore
centromere详细解释
cen.tro.mere n.（名词）The most condensed and constricted region of a chromosome to which the spindle fiber is attached during mitosis.着丝点，着丝粒：一个染色体上最密集、压缩的区域，有丝分裂时梭形纤维附着于此 【引伸】 cen.tromer.ic
