AZIMUTH, in astronomy, an arch of the horizon, intercepted between the meridian of the place and the azimuth, or vertical circle passing through the centre of the object, which is equal to the angle of the zenith, formed by the meridian and vertical circle; or it is found by this proportion, as the radius to the tangent of the latitude of the place, so is the tangent of
of the sun's or star's altitude, for instance, to the cosine of the azimuth from the south, at the time of the equinox. To find the azimuth by the globe, see GEOGRAPHY.