early 15c. (implied in curved), from Latin curvus "crooked, curved, bent," and curvare "to bend," both from PIE root *(s)ker- "to turn, bend" (see ring (n.)).
1690s, "curved line," from curve (v.). With reference to the female figure (usually plural, curves), from 1862; as a type of baseball pitch, from 1879.
A line or surface that deviates from straightness in a smooth, continuous fashion.
Something characterized by such a line or surface, especially a rounded line or contour of the human body.
A curved line representing variations in data on a graph.
For each; apiece; per each: The meetings were a dollar ''a throw''
[1896+; probably fr carnival games where the customer pays so much for several throws of a ball, a ring, etc, trying to win a prize]