Hypernyms:line
Inherited Hypernyms:great circlelinelocationobjectphysical entityentity
Direct Hyponyms:celestial equatorcelestial horizoneclipticequatorequinoctialequinoctial circleequinoctial linehorizonhour circleline of longitudemeridianvertical circle
Full Hyponyms:
celestial equatoreclipticequatorhorizonhour circlemagnetic meridianmeridianobserver's meridianprime meridianvertical circle