%muth%

n. [ OE. azimut, F. azimut, fr. Ar. as-sum&unr_;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-rā's the vertex of the heaven. Cf. Zenith. ] (Astron. & Geodesy) (a) The quadrant of an azimuth circle. (b) An arc of the horizon intercepted between the meridian of the place and a vertical circle passing through the center of any object; as, the azimuth of a star; the azimuth or bearing of a line surveying. [ 1913 Webster ]

☞ In trigonometrical surveying, it is customary to reckon the azimuth of a line from the south point of the horizon around by the west from 0° to 360°. [ 1913 Webster ]

Azimuth circle, or
Vertical circle, one of the great circles of the sphere intersecting each other in the zenith and nadir, and cutting the horizon at right angles. Hutton. --
Azimuth compass, a compass resembling the mariner's compass, but having the card divided into degrees instead of rhumbs, and having vertical sights; used for taking the magnetic azimuth of a heavenly body, in order to find, by comparison with the true azimuth, the variation of the needle. --
Azimuth dial, a dial whose stile or gnomon is at right angles to the plane of the horizon. Hutton. --
Magnetic azimuth, an arc of the horizon, intercepted between the vertical circle passing through any object and the magnetic meridian. This is found by observing the object with an azimuth compass. [ 1913 Webster ]

a. Of or pertaining to the azimuth; in a horizontal circle. [ 1913 Webster ]

Azimuthal error of a transit instrument, its deviation in azimuth from the plane of the meridian. [ 1913 Webster ]

n. [ Ger. bismuth, wismuth: cf. F. bismuth. ] (Chem.) One of the elements; a metal of a reddish white color, crystallizing in rhombohedrons. It is somewhat harder than lead, and rather brittle; masses show broad cleavage surfaces when broken across. It melts at 507° Fahr., being easily fused in the flame of a candle. It is found in a native state, and as a constituent of some minerals. Specific gravity 9.8. Atomic weight 207.5. Symbol Bi. [ 1913 Webster ]

☞ Chemically, bismuth (with arsenic and antimony is intermediate between the metals and nonmetals; it is used in thermo-electric piles, and as an alloy with lead and tin in the fusible alloy or metal. Bismuth is the most diamagnetic substance known. [ 1913 Webster ]

Bismuth glance, bismuth sulphide; bismuthinite. --
Bismuth ocher, a native bismuth oxide; bismite. [ 1913 Webster ]

a. Containing bismuth. [ 1913 Webster ]

a. (Chem.) Of or pertaining to bismuth; containing bismuth, when this element has its higher valence; as, bismuthic oxide. [ 1913 Webster ]

a. [ Bismuth + -ferous. ] Containing bismuth. [ 1913 Webster ]

{ } n. Native bismuth sulphide; -- sometimes called bismuthite. [ 1913 Webster ]

a. Of, or containing, bismuth, when this element has its lower valence. [ 1913 Webster ]

n. (Min.) Hydrous carbonate of bismuth, an earthy mineral of a dull white or yellowish color. [ Written also bismuthite. ] [ 1913 Webster ]

n. [ Gr. &unr_;; &unr_; in + &unr_; belly + &unr_; to speak: cf. F. engastrimythe. ] An ventriloquist. [ Obs. ] [ 1913 Webster ]

prop. n. An extinct genus comprising the mammoths.
Syn. -- genus Mammuthus. [ WordNet 1.5 ]

prop. n. (Zool.) The species name for the woolly mammoth, a very hairy mammoth common in colder portions of the Northern hemisphere.
Syn. -- woolly mammoth, northern mammoth. [ WordNet 1.5 ]