Hour circle
Hour Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The twenty-fourth part of a day; sixty minutes. [1913 Webster]

2. The time of the day, as expressed in hours and minutes, and indicated by a timepiece; as, what is the hour? At what hour shall we meet? [1913 Webster]

3. Fixed or appointed time; conjuncture; a particular time or occasion; as, the hour of greatest peril; the man for the hour. [1913 Webster]

Woman, . . . mine hour is not yet come. --John ii. 4. [1913 Webster]

This is your hour, and the power of darkness. --Luke xxii. 53. [1913 Webster]

4. pl. (R. C. Ch.) Certain prayers to be repeated at stated times of the day, as matins and vespers. [1913 Webster]

5. A measure of distance traveled. [1913 Webster]

Vilvoorden, three hours from Brussels. --J. P. Peters. [1913 Webster]

{After hours}, after the time appointed for one's regular labor.

{Canonical hours}. See under {Canonical}.

{Hour angle} (Astron.), the angle between the hour circle passing through a given body, and the meridian of a place.

{Hour circle}. (Astron.) (a) Any circle of the sphere passing through the two poles of the equator; esp., one of the circles drawn on an artificial globe through the poles, and dividing the equator into spaces of 15[deg], or one hour, each. (b) A circle upon an equatorial telescope lying parallel to the plane of the earth's equator, and graduated in hours and subdivisions of hours of right ascension. (c) A small brass circle attached to the north pole of an artificial globe, and divided into twenty-four parts or hours. It is used to mark differences of time in working problems on the globe.

{Hour hand}, the hand or index which shows the hour on a timepiece.

{Hour line}. (a) (Astron.) A line indicating the hour. (b) (Dialing) A line on which the shadow falls at a given hour; the intersection of an hour circle which the face of the dial.

{Hour plate}, the plate of a timepiece on which the hours are marked; the dial. --Locke.

{Sidereal hour}, the twenty-fourth part of a sidereal day.

{Solar hour}, the twenty-fourth part of a solar day.

{The small hours}, the early hours of the morning, as one o'clock, two o'clock, etc.

{To keep good hours}, to be regular in going to bed early. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • hour-circle — hourˈ circle noun (astronomy) 1. A great circle passing through the celestial poles 2. The equivalent of a meridian 3. The circle of an equatorial which shows the right ascension • • • Main Entry: ↑hour …   Useful english dictionary

  • hour circle — n. Astron. any great circle of the celestial sphere which passes through the celestial poles and is therefore perpendicular to the celestial equator …   English World dictionary

  • hour circle — Astron. a great circle on the celestial sphere passing through the celestial poles and containing a point on the celestial sphere, as a star or the vernal equinox. Also called circle of declination. [1665 75] * * * ▪ astronomy       in astronomy …   Universalium

  • hour circle — noun a great circle on the celestial sphere that passes through both celestial poles • Hypernyms: ↑great circle * * * noun 1. : a circle of the celestial sphere passing through the two poles 2. : the circle upon an equatorial telescope mounted… …   Useful english dictionary

  • hour circle — hour′ cir cle n. astron. a great circle on the celestial sphere passing through the celestial poles and containing a point on the celestial sphere, as a star or the vernal equinox • Etymology: 1665–75 …   From formal English to slang

  • hour circle — Any great circle joining the celestial poles and passing through a point on the celestial sphere. All celestial bodies are positioned on particular hour circles. Unlike celestial meridians, which remain fixed with respect to the earth, hour… …   Aviation dictionary

  • hour circle — noun Date: 1690 a circle on the celestial sphere that passes through both celestial poles …   New Collegiate Dictionary

  • hour circle — (Astronomy) great circle that passes through both poles of the celestial sphere …   English contemporary dictionary

  • hour-circle — n. Meridian, great circle of the sphere …   New dictionary of synonyms

  • hour circle — /ˈaʊə sɜkəl/ (say owuh serkuhl) noun any great circle in the celestial sphere passing through the celestial poles …   Australian English dictionary

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