**great circle** — n. any circle described on the surface of a sphere by a plane which passes through the center of the sphere; specif., such a circle on the earth s surface: a course (great circle course) plotted along a great circle of the earth is the shortest… … English World dictionary

**great-circle route** — The route that follows the shortest arc of a great circle between two points. See great circle course … Aviation dictionary

**Great-circle navigation** — is the practice of navigating a vessel (such as a ship or aircraft) along a track that follows a great circle. A great circle track is the shortest distance between two points on the surface of the earth. MethodsIn order to construct a great… … Wikipedia

**Great circle** — For fictional interstellar organization called Great Circle, see Andromeda (novel). A great circle divides the sphere in two equal hemispheres A great circle, also known as a Riemannian circle, of a sphere is the intersection of the sphere and a… … Wikipedia

**great-circle sailing** — noun : the navigation or conducting of a ship on a great circle track or on a course determined in relation to a great circle track compare sailing * * * /grayt serr keuhl/, Navig. sailing between two points more or less according to an arc of a… … Useful english dictionary

**great circle** — A circle on the surface of the sphere (earth) whose center and radii are those of the sphere itself. Only one great circle may be drawn through two places that are not diametrically opposite on the surface of a sphere. The shortest distance… … Aviation dictionary

**great circle route** — ▪ navigation the shortest course between two points on the surface of a sphere. It lies in a plane that intersects the sphere s centre and was known by mathematicians before the time of Columbus. Until the 19th century ships generally… … Universalium

**great circle** — noun a) A circle defined as the intersection of the surface of a sphere and a plane which passes through the centre of the sphere. Wherever a navigator may be, it certainly would be to his advantage to be able to find the great circle, or… … Wiktionary

**great** — adj. & n. adj. 1 a of a size, amount, extent, or intensity considerably above the normal or average; big (made a great hole; take great care; lived to a great age). b also with implied surprise, admiration, contempt, etc., esp. in exclamations… … Useful english dictionary

**Circle** — This article is about the shape and mathematical concept. For other uses, see Circle (disambiguation). Circle illustration showing a radius, a diameter, the centre and the circumference … Wikipedia