"tumor composed of bone-marrow cells," 1848, from Greek myelos "marrow" (a word of unknown origin) + -oma.
Entries linking to myeloma
-oma
word-forming element, from Greek -oma, with -o-, lengthened stem vowel + -ma, suffix forming neuter nouns and nouns that indicate result of verbal action (equivalent of Latin -men); especially taken in medical use as "morbid growth, tumor," based on sarcoma, carcinoma.