Aviation Glossary

At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official, and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including our FAA written test prep and FAA practical test prep software and apps. If you like this glossary, you'll love them with their polished learning environments and world's best and clearest content (please do give them a try.).

Circle

A closed plane figure with every point an equal distance from the center. A circle has the greatest area for its circumference of any enclosed shape.

source: FAA Aviation Maintenance Technician Airframe Handbook (FAA-H-8083-31)

(geometry) A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from another point. The set of all points (x, y) such that (x-1)²?+?y² = r² is a circle of radius r around the point (1, 0).
A two-dimensional geometric figure, a disk, consisting of the set of all those points of a plane at a distance less than or equal to a fixed distance from another point.
Any thin three-dimensional equivalent of the geometric figures.
A curve that more or less forms part or all of a circle - move in a circle;
Orbit.

source: Wikitionary / Wikipedia and Related Sources (Edited)

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Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be. Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which you saw the original term. Please use your good judgement when using this resource.