Schwalbenschwanz

Etymology
From.

Noun

 * 1) swallowtail tail of a swallow
 * 2)  tailcoat
 * 3) swallowtail butterfly of the family
 * 4) dovetail type of joint where adjoining boards are fastened by interlocking fan-shaped cutouts
 * 1) dovetail type of joint where adjoining boards are fastened by interlocking fan-shaped cutouts