What's the noun for tromboncino? Here's the word you're looking for.
trombone
A musical instrument in the brassfamily, having a cylindricalbore, and usually a sliding tube (but sometimes piston valves, and rarely both). Most often refers to the tenor trombone, which is the most common type of trombone and has a fundamental tone of B♭ˌ (contra B♭).
An awkward union of disparate elements combining the disadvantages of both.
tromboncino
A kind of squash, that grows on a vine, has a shape reminiscent of a trombone, is eaten as a summer squash, and often exceeds two feet in length when mature as a winter squash.