elliptic

adjective

Pronunciation: /ɪˈlɪp.tɪk/

Etymology: From Ancient Greek ἐλλειπτικός (elleiptikós), from ἐλλείπω (elleípō, “I leave out, omit”). By surface analysis, ellipse + -tic.

Of or pertaining to an ellipse.
“Novv ſince the Planets move in Elliptick Orbits, in one of vvhoſe foci the Sun is, and by a Radius from the Sun deſcribe equal Area's in equal Times, vvhich no other Lavv of a Circulating Fluid, but the Harmonical Circulation can Account for, vve muſt find out a Lavv for the Paracentrical Motion, that may make the Orbits Elliptick.”
“In this chapter, the history of solving elliptic problems by direct marching methods is reviewed.”
Of or pertaining to a broad field of mathematics that originates from the problem of calculating arc lengths of an ellipse.
“elliptic integral”
“elliptic function”
That has coefficients satisfying a condition analogous to the condition for the general equation for a conic section to be of an ellipse.
“elliptic partial differential equation”
“elliptic operator”
Oval, with a short or no point.
Of, or showing ellipsis; having a word or words omitted; elliptical.
“The message, which is elliptic, could be spelled out as: (Hello) Olive. This is Julian. I am here until you want to ring me.”

Etymology: From Ancient Greek ἐλλειπτικός (elleiptikós), from ἐλλείπω (elleípō, “I leave out, omit”). By surface analysis, ellipse + -tic.

An elliptical function, equation, path, etc.
“The Planetary Paths I trace, / Exploring Realms of boundleſs Space; / Elliptics, Angles, Cubes, and Curves, / In me ſupply the Place of Nerves; […]”
“Two men were smoking over a bottle of wine at one table; they were talking of parabolics and elliptics, and describing diagrams on the table with a wet finger; […]”