protuberant (adj.) Look up protuberant at Dictionary.com
1640s, from French protubérant (16c.) and directly from Late Latin protuberantem (moninative 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.