A circle described by the intersection of the surface of the Earth with a plane passing through the center of the Earth. The shortest distance between two points on the surface of the Earth is a segment of a great circle. All longitudes are great circles; the only latitude that is a great circle is the equator.

The line over the surface of the earth in the shortest curved path. It is, in fact, the shortest line joining two points on the earth's surface.

The intersection of a sphere with any plane passing through the center of the sphere.

(GC) Line on Surface of Sphere Describing Plane Running thru Center

A circle which cuts a sphere into two equal halves, such as, on the Earth, the Equator, or on the Celestial Sphere, the Celestial Equator, the Ecliptic, or the Horizon. So-called because such a circle has a larger circumference than any other circle which can be inscribed on the sphere.

Any circle formed by a flat plane that passes through the centre of the earth.

a circle on the Earth's surface, the plane of which passes through the center of the Earth.

A circle on the surface of the sphere that shares its center with the center of the sphere. An arc of such a circle is often called a great circle, even though it is not a full circle. Note: The shortest path connecting two points on the surface of a sphere is a great circle.

a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center

a circle drawn around the earth that, if the earth were sliced along it, would slice through the center core of the earth

a circle formed by passing a plane though the exact center of a sphere

a circle on a sphere's surface whose plane is passing exactly through the center of the sphere

a circle on the sphere that has the same center as the sphere

a circle on the surface of a sphere which has the center of the sphere as its center

a circle on the surface of a sphere whose centre is at the centre of the sphere

a circle that is produced by the intersection of the Earth's surface with a plane passing through the center of the Earth

a circle whose plain intersects with the centre of the Earth

a line formed on a sphere by a plane going through the center of the sphere

an equator, ie a circumferential circle

an imaginary circle around the globe that divides the globe into two equal parts

an imaginary circle on the surface of a sphere whose plane passes through the center of the sphere

a straight line as drawn on a globe

A circle formed on the surface of a sphere by the intersection of a plane that passes through the center of the sphere.

A circle formed on the surface of a sphere which is formed by the intersection of a plane which passes through the centre of a sphere. A great circle path is the shortest distance on a spherical surface between two points.

Circle inscribed on a sphere made by passing a plane through the center of the sphere. (On the earth's surface all meridians are great circles, as is the equator).

A circle formed on the surface of a sphere by a plane that passes through the center of the sphere. The Equator, each meridian, and each other full circumference of the Earth forms a great circle. The arc of a great circle shows the shortest distance between points on the surface of the Earth.

An imaginary circle on the surface of a sphere whose center is at the center of the sphere.

The intersection of a plane through the center of the Earth and the surface of the Earth. The shortest distance between two points on the Earth is a great circle route. All longitudes are great circles. The only latitude that is a great circle is the Equator.

a course plotted on the surface of the globe that is the shortest distance between two points.

Circle on the surface of a sphere that is the curve of intersection of the sphere with a plane passing through its center.

A circle on the surface of a sphere whose center is also the center of the sphere. Lines of longitude and the equator are examples of great circles on the Earth. See also small circle

A line on the earth's surface, the plane of which passes through the centre of the globe. This shortest distance between two points on the sphere is also known as an orthodrome.

The line of intersection of the surface of a sphere and any plane which passes through the center of the sphere.

A circle drawn around the Earth such that the center of the circle is at the center of the Earth. Following such a circle plots the shortest distance between any two points on the surface of the Earth.

A circle described on the surface of a sphere (Earth, for example) so that its plane passes through the center of the sphere.

The shortest distance between two points on the surface or a globe; a Great Circle cuts through the center of the Earth

The intersection of a sphere and a plane passing through its center (Lesson 11.2).