granuloma (n.)

1790, from Late Latin granulum "granule, a little grain," diminutive of Latin granum "grain, seed" (from PIE root *gre-no- "grain") + -ar. Replaced granulous (late 14c.). Related: Granularity.

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.