noun
- a large cell produced during the early stages of embryonic development, typically containing yolk and dividing more slowly than smaller cells
Usage: biology; embryology
Examples
- The macromeres in the frog embryo contain most of the yolk material.
- During cleavage, macromeres divide less frequently than micromeres.
- Scientists observed that macromeres give rise to the endoderm in many species.
- The unequal distribution of cytoplasm creates both macromeres and micromeres.
- Macromeres play a crucial role in early vertebrate development.
- The researcher studied how macromeres contribute to gastrulation.