| Tuber 1. (n.) A fleshy, rounded stem or root, usually containing starchy matter, as the potato or arrowroot; a thickened root-stock. 2. (n.) A genus of fungi. See Truffle. 3. (n.) A tuberosity; a tubercle. Thesaurus Entries ball, balloon, bilge, bladder, blain, bleb, blister, blob, boll, bolus, boss, bow, bubble, bulbil, bulblet, bulge, bulla, bump, bunch, burl, button, cahot, chine, clump, condyle, convex, corm, dowel, ear, ellipsoid, flange, flap, gall, geoid, globe, globelet, globoid, globule, glomerulus, gnarl, gob, gobbet, handle, hill, hump, hunch, jog, joggle, knob, knot, knur, knurl, lip, loop, lump, mole, mountain, nevus, nub, nubbin, nubble, oblate spheroid, orb, orbit, orblet, papilloma, peg, pellet, prolate spheroid, radicle, radix, rhizome, rib, ridge, ring, rondure, root, rootstock, shoulder, sphere, spheroid, spherule, spine, stud, style, tab, tap, taproot, tuber, tubercle, tubercule, verruca, vesicle, wale, wart, welt |