1. A flattened rigid plate forming part of the body covering of many animals
2. A series of notes differing in pitch according to a specific scheme (usually within an octave); SYN. musical scale.
3. A specialized leaf or bract that protects a bud or catkin; SYN. scale leaf.
4. The ratio between the size of something and a representation of it
5. An indicator having a graduated sequence of marks.
6. An instrument for weighing; shows amount of mass; SYN. weighing machine.
7. An ordered reference standard:; SYN. scale of measurement, graduated table, ordered series.
8. Relative magnitude
9. A thin flake of dead epidermis shed from the surface of the skin; SYN. scurf.
In music, a sequence of pitches that establishes a key, and in some respects the character of a composition. A scale is defined by its starting note and may be major or minor depending on the order of intervals. A chromatic scale is the full range of 12 notes: it has no key because there is no fixed starting point.
A whole-tone scale is a six-note scale and is also indeterminate in key: only two are possible. A diatonic scale has seven notes, a pentatonic scale has five.