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scalar (adj.)

"resembling a ladder," 1650s, from Latin scalaris "of or pertaining to a ladder," from scalae (plural) "ladder, steps, flight of steps" (see scale (n.2)). Mathematical sense first recorded 1846.

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Definitions of scalar from WordNet
1
scalar (adj.)
of or relating to a musical scale;
he played some basic scalar patterns on his guitar
scalar (adj.)
of or relating to a directionless magnitude (such as mass or speed etc.) that is completely specified by its magnitude;
scalar quantity
2
scalar (n.)
a variable quantity that cannot be resolved into components;
From wordnet.princeton.edu