Results

Definition of underside : The lower or lowest side of anything.

Synonyms:

fundament, ass, keister, butt, buttocks, tooshie, rump, prat, tush, arse, undersurface, bed, buns, tail end, bottom of the inning, root, bottomland, merchant ship, stern, backside, merchantman, behind, rear end, can, over, freighter, hind end, derriere, tail, fanny, rear, bum, nates, seat, posterior, hindquarters

depths, base, nadir, foot, foundation, sole, basement, bottom, underneath

Usage examples:

• It might be mentioned that the bells were not strung as a belt to encircle the pony, but were attached below to the underside of the thills in such a manner as to contribute chimes. - "The Adventures of Bobby Orde", Stewart Edward White.
• This is a large snake, reddish- brown in colour, the underside, for about half the length, being bright orange, the tint gradually subsiding to pale yellow towards the tail. - "Tropic Days", E. J. Banfield.
• At that instant the alligator rolled in the water, showing its softer underside. - "Jack Haydon's Quest", John Finnemore.