-oma
suffixUK /ˈəʊ.mə/ · CA, US /ˈoʊ.mə/
Etymology From Ancient Greek -ωμα (-ōma), from verbs in -όω (-óō) + -μα (-ma) (from Proto-Indo-European *-mn̥), which lengthens a preceding vowel.
2
Medicine, Pathology, Sciences Morpheme, Specifically Forming nouns indicating tumors or masses, which may be non-neoplastic or (more often) neoplastic, and (if the latter) either benign or malignant (cancerous); in accord with present-day understanding of histopathology, the suffix is now nonproductive for non-neoplastic senses.