mesoderm [i m3zqd$:Rm | m3sq` ]     (순위: 17405 - 대졸 수준)   뜻  명) [생물] 중배엽 Mean  The middle embryonic germ layer, lying between the ectoderm and the endoderm, from which connective tissue, muscle, bone, and the urogenital and circulatory systems develop.