I. ˈskā-lər-, -ˌlär adjective
Etymology: Latin scalaris, from scalae stairs, ladder — more at scale
Date: circa 1656
1. : having an uninterrupted series of steps : graduated
scalar chain of authority
scalar cells
2.
a. : capable of being represented by a point on a scale
scalar quantity
b. : of or relating to a scalar or scalar product
scalar multiplication
II. noun
Date: 1846
1. : a real number rather than a vector
2. : a quantity (as mass or time) that has a magnitude describable by a real number and no direction