WordReference Random House Unabridged Dictionary of American English © 2026
mes•o•mere
(mez′ə mēr′, mes′-, mē′zə-, -sə-),USA pronunciation n. [Embryol.]
- Developmental Biologya blastomere of intermediate size between a micromere and a macromere.
- Developmental Biologythe intermediate zone of the mesoderm.
- meso- + -mere 1900–05