azimuth circle

noun
1. : one of the great circles of the celestial sphere intersecting each other in the zenith and nadir — called also vertical circle; compare meridian 2
2. : a horizontal graduated circle for indicating azimuth (as one having sight vanes and screens and attached to a compass to show magnetic azimuths or one having a telescope for accurate measurement of differences of azimuth)

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a device for measuring azimuths, consisting of a graduated ring equipped with a sighting vane on each side, which fits concentrically over a compass.
[1585-95]

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azimuth circle,
1. one of the great circles intersecting one another in the zenith and nadir, and cutting the horizon at right angles.
2. a device like a gunsight mounted on a movable ring on a stand which contains a compass. By sighting through the azimuth circle, the navigator can determine the bearing of an object from his craft.

Useful english dictionary. 2012.

Look at other dictionaries:

  • Azimuth circle — Azimuth Az i*muth, n. [OE. azimut, F. azimut, fr. Ar. as sum?t, pl. of as samt a way, or perh., a point of the horizon and a circle extending to it from the zenith, as being the Arabic article: cf. It. azzimutto, Pg. azimuth, and Ar. samt al… …   The Collaborative International Dictionary of English

  • Azimuth circle — Circle Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single… …   The Collaborative International Dictionary of English

  • azimuth circle — noun Instrument for measuring azimuths. It is a graduated circle on a sight, gun carriage, searchlight, etc …   Wiktionary

  • azimuth circle — a device for measuring azimuths, consisting of a graduated ring equipped with a sighting vane on each side, which fits concentrically over a compass. [1585 95] * * * …   Universalium

  • azimuth circle — tool for measuring azimuths that comprises of a graduated ring having a sighting vane on each side that fits over a compass in a concentric manner …   English contemporary dictionary

  • Azimuth — Az i*muth, n. [OE. azimut, F. azimut, fr. Ar. as sum?t, pl. of as samt a way, or perh., a point of the horizon and a circle extending to it from the zenith, as being the Arabic article: cf. It. azzimutto, Pg. azimuth, and Ar. samt al r[=a] s the… …   The Collaborative International Dictionary of English

  • Azimuth compass — Azimuth Az i*muth, n. [OE. azimut, F. azimut, fr. Ar. as sum?t, pl. of as samt a way, or perh., a point of the horizon and a circle extending to it from the zenith, as being the Arabic article: cf. It. azzimutto, Pg. azimuth, and Ar. samt al… …   The Collaborative International Dictionary of English

  • Azimuth dial — Azimuth Az i*muth, n. [OE. azimut, F. azimut, fr. Ar. as sum?t, pl. of as samt a way, or perh., a point of the horizon and a circle extending to it from the zenith, as being the Arabic article: cf. It. azzimutto, Pg. azimuth, and Ar. samt al… …   The Collaborative International Dictionary of English

  • Circle — Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single curve… …   The Collaborative International Dictionary of English

  • Circle of altitude — Circle Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single… …   The Collaborative International Dictionary of English

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