myeloma

my·e·lo·ma

noun \ˌmī-ə-ˈlō-mə\

plural my·e·lo·mas also my·e·lo·ma·ta \-mət-ə\

Definition of MYELOMA

: a primary tumor of the bone marrow formed of any one of the bone marrow cells (as myelocytes or plasma cells) and usually involving several different bones at the same time—see multiple myeloma