The quantity of light equal to a lumen radiated or received in one hour

Synonym of evil day

Synonym of temporal hour

one twenty-fourth of a full day-night cycle (as opposed to one twelfth of a night or a day)

crucial moment, especially in which one can finally show his potential or must reckon with something / moment of death

(education, US) A time-based unit of measurement used in American colleges and universities to track student educational attainment. Each unit represents approximately 12 hours of class or contact time with an instructor over the course of a semester.

Alternative letter-case form of student hour

A full sixty-minute period (as opposed to a scheduled length of time that is called an "hour" but not equivalent to sixty minutes, such as a student hour).

Man-hour.

Late afternoon before sunset.