Real Dictionary

hour angle in British English
the angle formed at the pole, or its arc on the celestial equator, between the hour circle of a celestial object and the observer's celestial meridian measured in hours, minutes, etc.: it represents the elapsed time since the object passed directly over t
noun: the angle, measured westward through 360°, between the celestial meridian of an observer and the hour circle of a celestial body
noun: the angular distance along the celestial equator from the meridian of the observer to the hour circle of a particular celestial body