Main Entry: pro·nor·mo·blast Pronunciation: (')prO-'nor-m&-"blast Function: noun : a cell recognized in some theories oferythropoiesis that arises from a myeloblast and gives rise to normoblasts and is approximately equivalent to the erythroblast of other theories called also macronormoblast,rubriblast
pronormoblast pro·nor·mo·blast (prō-nôr'mə-blāst') n. The first of four stages in development of the normoblast. Also called proerythroblast, rubriblast.
