Molniya orbit

Etymology
From. The Russian word was used as the name for a series of Soviet/Russian communications satellites, and the orbits which they were placed in.

Noun

 * 1) A highly elliptical orbit with an eccentricity of 0.74, inclination of 63.4 degrees, an argument of perigee of −90 degrees, and an orbital period of half a sidereal day, around the Earth.
 * 2) By analogy, the equivalent orbit for the southern hemisphere, with the argument of perigee changed to +90 degrees.
 * 3)  Both the northern and southern hemisphere orbits for the Earth.
 * 4) By analogy, equivalent orbits for other bodies, which provide low apparent motion across the dome of the sky at apoapsis, allowing long duration communications/observation with low tracking rates at polar latitudes.
 * 5)  The orbits around Earth and other bodies with these qualities.

Coordinate terms

 * : a similar orbit with the orbital period extended to one day (a type of geosynchronous orbit)