scalar
UK /ˈskeɪ.lə/ · US /skeɪ.lɚ/ adjective, noun
Forms scalars
- adjective (mathematics) Having magnitude but not direction.
- adjective (computer science) Consisting of a single value (e.g. integer or string) rather than multiple values (e.g. array).
- adjective Of, or relating to scale.
- adjective (music) Of or pertaining to a musical scale.
- adjective (physics) Relating to particles with a spin (quantum angular momentum) of 0 (known as spin 0).
- adjective (linguistics) Pertaining to the dimension on which something is measured.
- noun (mathematics) A quantity that has magnitude but not direction.
- noun (electronics) An amplifier whose output is a constant multiple of its input.
Etymology
Borrowed from Latin scālāris, adjectival form from scāla (“a flight of steps, stairs, staircase, ladder, scale”), for *scadla, from scandere (“to climb”); compare scale. The mathematics sense was coined by Irish mathematician and astronomer William Rowan Hamilton in 1846.
Webster’s 1913
- noun In the quaternion analysis, a quantity that has magnitude, but not direction; --distinguished from a vector, which has both magnitude and direction.
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “scalar”, CC BY-SA 4.0. Details