1) Type of embryonic cell 
1. A blastomere of a size intermediate between a macromere and a micromere. ... 2. The zone between an epimere and a hypomere. ... Origin: meso-+ G. Meros, part ... (05 Mar 2000) ... 
(mez´o-) (me´zo-mēr) a blastomere of size intermediate between a macromere and a micromere. a midzone of the mesoderm between the epimere and hypomere.
Type: Term Pronunciation: mez′ō-mēr Definitions: 1. A blastomere of a size intermediate between a macromere and a micromere. 2. The zone between an epimere and a hypomere.