pronormoblast pro·nor·mo·blast (prō-nôr'mə-blāst')
n.
The first of four stages in development of the normoblast. Also called proerythroblast, rubriblast.
| the offspring of a zebra and a donkey. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
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