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protuberant (adj.)

"prominent beyond the surrounding surface," 1640s, from French protubérant (16c.) and directly from Late Latin protuberantem (nominative protuberans), present participle of protuberare "to swell, bulge, grow forth," from Latin pro "forward" (see pro-) + tuber "lump, swelling" (from PIE root *teue- "to swell"). Related: Protuberantly.

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Definitions of protuberant from WordNet

protuberant (adj.)
curving outward;
Synonyms: bellied / bellying / bulbous / bulging / bulgy
From wordnet.princeton.edu