An Etymological Dictionary of Astronomy and Astrophysics

Moderately cold.

Etymology (EN): M.E., from O.E. col, PIE base *gel- “cold, to freeze.”

Etymology (PE): Sard “cold, cool,” from Mid.Pers. sart, Av. sarəta- “cold,” Skt. śiśira- “cold,” Ossetian sald “cold,” L. calidus “warm,” Lith. šaltas “cold,” Welsh clyd “warm,” PIE *keltos- “cool”.