macromere

noun

mac·​ro·​mere ˈma-krə-ˌmir 

: a large blastomere see blastula illustration

Word History

Etymology

macro- + -mere (in blastomere)

First Known Use

1877, in the meaning defined above

Medical Definition

macromere

noun

mac·​ro·​mere ˈmak-rō-ˌmi(ə)r 

: any of the large blastomeres that occur in the hemisphere of a telolecithal egg containing the vegetal pole and that are formed by unequal segmentation compare micromere