proerythrocyte

The precursor of an erythrocyte; an immature red blood cell with a nucleus.

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pro·eryth·ro·cyte -.sīt n any immature red blood cell

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pro·eryth·ro·cyte (pro″ə-rithґro-sīt) any precursor of an erythrocyte; the term was not adopted by any scheme of red cell morphological development. See erythrocytic series, under series.