word-forming element, from Greek -oma, with 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.
-oma in Medicine
-omasuff. Tumor: lipoma.
-oma in Science
-oma A suffix meaning "tumor" or "cancer," as in carcinoma. Often, the suffix is added to the name of the affected body part, as in lymphoma, cancer of the lymph tissue.