quasi-zenith
Astronomical term referring to a point near the zenith, often used in the context of satellite orbits (e.g., quasi-zenith satellite system).
The quasi-zenith satellite system was developed in Japan.
quasi-zenith satellite
Compound of 準 (jun, 'quasi-') and 天頂 (tenchō, 'zenith'). The exact historical derivation is uncertain; the term is a modern technical coinage.