An Etymological Dictionary of Astronomy and Astrophysics

In the same direction as the rotating hands of a clock when viewed from in front.

Etymology (EN): From → clock + wise “way, manner,” O.E. wise (adj.), from wis, from P.Gmc. *wisaz (cf. Du. wijs, Ger. weise “wise”), PIE base *weid-/*wid- “to see, to know;” cf. Av vaeda “I know,” Skt. veda “I know,” Gk. oida “I know”.

Etymology (PE): Sâ’atsu, from sâ’at, → clock, + su “direction,” Mid.Pers. sôg, sôk “side, direction”.