Definition of Longetude
Lon"gi*tude (?), n. [F., fr. L.
longitudo, fr. longus long.] 1.
Length; measure or distance along the longest line; --
distinguished from breadth or thickness; as, the
longitude of a room; rare now, except in a humorous
sense. Sir H. Wotton.
The longitude of their cloaks.
Sir. W. Scott.
Mine [shadow] spindling into longitude
immense. Cowper.
2. (Geog.) The arc or portion of the
equator intersected between the meridian of a given place and the
meridian of some other place from which longitude is reckoned, as
from Greenwich, England, or sometimes from the capital of a country,
as from Washington or Paris. The longitude of a place is expressed
either in degrees or in time; as, that of New York is 74° or 4 h.
56 min. west of Greenwich.
3. (Astron.) The distance in degrees,
reckoned from the vernal equinox, on the ecliptic, to a circle at
right angles to the ecliptic passing through the heavenly body whose
longitude is designated; as, the longitude of Capella is
79°.
Geocentric longitude (Astron.), the
longitude of a heavenly body as seen from the earth. --
Heliocentric longitude, the longitude of a
heavenly body, as seen from the sun's center. --
Longitude stars, certain stars whose position
is known, and the data in regard to which are used in observations
for finding the longitude, as by lunar distances.
- Webster's Unabridged Dictionary (1913)
- Angular distance measured west or east of the Greenwich Meridian.
- An imaginary line perpendicular to the equator, passing through the North Pole and South Pole.
- meridian
Portuguese
- meridiano
- The Nuttall Encyclopedia
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