Tailpiece n. : A piece at the end; an appendage.

Tailpiece n. : One of the timbers which tail into a header, in floor framing. See Illust. of Header.

Tailpiece n. : An ornament placed at the bottom of a short page to fill up the space, or at the end of a book.

Tailpiece n. : A piece of ebony or other material attached to the lower end of a violin or similar instrument, to which the strings are fastened.

Example:
How do I stop a drain from leaking from the Tailpiece threads under a sink?

Taxonomy
tailpiece, strings, anchors, instrument, free encyclopedia, fine tuner, violin family, adjusted, tuners, search, Unsourced, string instrument, tail end, Mandolin, strong enough, tension, string length, the bridge.

Defination from the web:
tailpiece has one fine tuner on the E string. The tailpiece, found on many musical instruments of the string instrument family, anchors the tail end of the strings, the end opposite the scroll or headstock. ...