An Etymological Dictionary of Astronomy and Astrophysics

A unit of time used in the Roman and Ottoman empires that divided the day from sunrise to sunset into 12 equal numbers of hours, resulting in long summer hours and short winter hours.

Etymology (EN): M.E., from O.Fr. temporal, from L. temporalis “of time, temporary,” from tempus (genitive temporis) “time, season, proper time or season,” → time; → hour.

Etymology (PE): Sâ’at→ hour; fasli, of or pertaining to fasl→ season.