hunchbacked, humpbacked; also transferred of round-backed tools.

resembling a perch's back in shape.

Swelling upwards to a summit.

Having a humped or crooked back; hunched, esp. in the names of fishes; cf. humpback, n. adj. Also transferred.

Of a thing: having a rise in the middle.

Having a back like that of a sow; resembling the back of a sow in shape or formation; ridged like a sow's back. sow-backed mutch, = sow-back, n. 1.

shaped like a fish's back, swelling upwards.

shaped like a whale's back.

attributive or as adj. Furnished with a whaleback (sense 1); of the shape of the back of a whale.

a back shaped like the wings of a beetle; so beetle-backed adj.