An elliptical function, equation, path, etc.

(geometry) Of or pertaining to an ellipse.

(mathematics) Of or pertaining to a broad field of mathematics that originates from the problem of calculating arc lengths of an ellipse.

(mathematics, in combination, of certain functions, equations and operators) That has coefficients satisfying a condition analogous to the condition for the general equation for a conic section to be of an ellipse.

(botany, of leaves) Oval, with a short or no point.