1. small cells produced during the early stages of embryonic development, typically formed by unequal cell division
Usage: biology; embryology

Examples

• The micromeres at the animal pole will eventually form the ectoderm.
• During cleavage, the embryo produces both micromeres and macromeres.
• Scientists observed that micromeres divide more rapidly than larger cells.
• The fate of micromeres is determined early in embryonic development.
• Micromeres contain less yolk than their larger counterparts.
• The researcher studied how micromeres contribute to tissue formation.