2.adjectiveOf or pertaining to a broad field of mathematics that originates from the problem of calculating arc lengths of an ellipse.
"Elliptic curve"
3.adjective(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.
"Elliptic operator"
4.adjective(of leaves) Oval, with a short or no point.