metamyelocyte

noun
meta·​my·​elo·​cyte | \ ˌmet-ə-ˈmī-ə-lə-ˌsīt How to pronounce metamyelocyte (audio) \

Medical Definition of metamyelocyte

: any of the most immature granulocytes present in normal blood that are distinguished by typical cytoplasmic granulation in combination with a simple kidney-shaped nucleus