/ Dictionary / Index M myeloma: Meaning and Definition of Find definitions for: my•e•lo•ma Pronunciation: (mī"u-lō'mu), [key] — pl. -mas, -ma•ta a tumor of plasma cells, arising in bone marrow, and often occurring at multiple sites, as in the vertebrae and flat skull bones. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: myeloma (Thesaurus) myeloid myelopathy Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language