What is the meaning of Elliptic?

Of or pertaining to an ellipse.

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

That has coefficients satisfying a condition analogous to the condition for the general equation for a conic section to be of an ellipse.

Oval, with a short or no point.

Of, or showing ellipsis; having a word or words omitted; elliptical.

An elliptical function, equation, path, etc.

Source: wiktionary.org