| hour angle | มุมชั่วโมง [พลังงาน ๒๖ ม.ค. ๒๕๔๕] |
| hour angle | (n) the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body |
| hour angle | (n) (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day, Syn. HA |