meridian

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Definition/MeaningWord/Phrase
standard time in the 9th time zone west of Greenwich, reckoned at the 135th meridian west; used in Hawaii and most of Alaska Alaska Standard Time , Yukon Time
standard time in the 4th time zone west of Greenwich, reckoned at the 60th meridian; used in Puerto Rico and the Virgin Islands and Bermuda and the Canadian Maritime Provinces Atlantic Standard Time , Atlantic Time
azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian AZ , azimuth
standard time in the 11th time zone west of Greenwich, reckoned at the 165th meridian west; used in the Midway Islands Bering Standard Time , Bering Time
standard time in the 6th time zone west of Greenwich, reckoned at the 90th meridian; used in the central United States Central Standard Time , Central Time , CST
imaginary line on the surface of the earth following (approximately) the 180th meridian dateline , date line , International Date Line
standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States Eastern Standard Time , Eastern Time , EST
local time at the 0 meridian passing through Greenwich, England; it is the same everywhere GMT , Greenwich Mean Time , Greenwich Time , universal time , UT , UT1
meridian passing through Greenwich; was internationally adopted as the earth's zero of longitude in 1884 Greenwich Meridian
standard time in the 10th time zone west of Greenwich, reckoned at the 150th meridian west; used in Hawaii and the western Aleutian Islands Hawaii Standard Time , Hawaii Time
angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body hour angle
distance east or west from the Greenwich meridian longitude
angular distance between a point on any meridian and the prime meridian at Greenwich longitude
map's lines for distance east or west of prime meridian longitude
interval between the moon's transit of a particular meridian and the next high tide at that meridian lunitidal interval
standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States Mountain Standard Time , Mountain Time , MST
meridian that passes through the observer's zenith observer's meridian
standard time in the 8th time zone west of Greenwich, reckoned at the 120th meridian west; used in far western states of the United States Pacific Standard Time , Pacific Time , PST
meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England) prime meridian
telescope mounted on an axis running east and west and used to time the transit of a celestial body across the meridian transit instrument
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