myelocytoma

noun
my·​e·​lo·​cy·​to·​ma | \ ˌmī-ə-lō-sī-ˈtō-mə How to pronounce myelocytoma (audio) \
plural myelocytomas also myelocytomata\ -​mət-​ə How to pronounce myelocytomata (audio) \

Medical Definition of myelocytoma

: a tumor especially of fowl in which the typical cellular element is a myelocyte or a cell of similar differentiation