a mathematical instrument, consisting of several lines drawn on wood, brass, silver, &c. and variously divided, according to the purposes it is intended to serve; whence it acquires various denominations, as the plain scale, diagonal scale, plotting scale. See GEOMETRY.

in music, is a denomination given to the arrangement of the six syllables invented by Guido Arete, ut, re, mi, fa, sol, la, called also gammut. See MUSIC.