SCIENCE|natural and applied sciences|earth sciences
- fad réalteolaíoch Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- astronomical longitude
- en
- Sainmhíniú the angle between the plane of the reference meridian and the plane of the celestial meridian Tagairt Multilingual Aeronautical Dictionary(AGARD,1980)