(astronautics) an orbit lying in, or approximately in, the plane of the equator for which the orbital period is equal to the spin period of the central body
- Stationary point
noun 1. a point on a curve at which the tangent is either horizontal or vertical, such as a maximum, a minimum, or a point of inflection 2. (astronomy) a point in the apparent path of a planet when it reverses direction
noun, Physics. 1. any of several energy states an atom may occupy without emitting electromagnetic radiation.
noun 1. standing wave. stationary wave noun 1. another name for standing wave stationary wave See standing wave.
noun, Radio and Television. 1. an interval between or during programs for identifying the station, making announcements, etc.