- The developmental stage of a granular leukocyte between the myeloblast and myelocyte, when a few specific granules appear in addition to azurophilic ones.
- A large uninuclear cell occurring in the circulating blood of persons with myelocytic leukemia.
[pro- + G. myelos, marrow, + kytos, cell]
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Examples: glitazone, GI cocktail, etc.