An Etymological Dictionary of Astronomy and Astrophysics

The → angular distance from the → North point eastward to the intersection of the → horizon with the → vertical circle passing through the object. Azimuth is 0° for an object due north, 90° due east, 180° due south, and 270° due west. → Altitude and azimuth constitute
the → horizon coordinate system.

Etymology (EN): From O.Fr. azimut, from Ar. as-sumut (السمت) “the directions, ways,” pl. of as-samt “the direction, way.”

Etymology (PE): Sugân, from su “direction” + -gân direction suffix.