(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)

(mathematics) Any plane curve that consists of loops (petals) emanating from a central point.

(mathematics) Any of a family of closed curves having two lobes; they satisfy the general equation y² = α²(x⁴ - x⁶).

The difference between the number of double points on a curve and the maximum possible for a curve of that degree

(geometry) For a plane curve C and a given fixed point P, the locus of points X such that PX is perpendicular to a tangent to the curve passing through X.

(topology) A map from the circle, S¹, to a topological space.^((McLarty, p. 4))

(mathematics) The elliptic curve associated with a solution of Fermat's equation.