mes.o.mere

n.（名詞）
A blastomere of intermediate size, larger than a micromere but smaller than a macromere.
中分裂球：中等尺寸的分裂球，大于小分裂球而小于大分裂球
The middle zone of the mesoderm of a chordate vertebrate embryo, from which excretory tissue develops.
中胚葉節(jié)：脊索類脊椎動(dòng)物胚胎的中胚層的中間部分，最終會(huì)發(fā)育成排泄組織