(mathematics) A plane curve having the equation y=a.x³+b.x²+c.x+d.

(mathematics) any curve in three-dimensional space; includes any plane curve as a subset

A dangerous curve on a roadway, around which drivers cannot see approaching traffic.

(optics) A curve to which the ray of light, reflected or refracted by another curve, are tangents, the reflecting or refracting curve and the luminous point being in one plane.

(mathematics) The bell-shaped curve that is typical of the normal distribution.

(idiomatic) Changing before competitors. / (idiomatic) Above average; generally performing well.

(mathematics, biology) An S-shaped curve that models the growth of many ecosystems.

(mathematics) Synonym of Lissajous figure

(astronomy) a graph of the intensity of radiation from an astronomical object as it changes with time

(mathematics) the locus of points in the Euclidean plane that satisfies some geometric or algebraic definition; a curve in a plane (as opposed to higher-dimensional space)