twelve hours
Clock's complete rotation
Twelve hours is half a day—the span from midnight to noon or noon to midnight.
The phrase often emphasizes duration: I slept for twelve hours, We've been driving for twelve hours straight.
In medical contexts, medications may be taken every twelve hours.
The twelve-hour clock divides the day into two such periods, distinguished by a.m. and p.m.
- noonDay's exact middle
- midnightTwelve o'clock at night
- clockDevice displaying time
- around the clockAt all times
- shiftMovement or work period
night shift · graveyard shift · time · time zone · time difference · duration · AM · PM · workday · rotation · overnight · daylight · darkness · watch · interval · stretch · span · morning
- dozen things
- Egyptian AfterlifeBook of the Dead, Pyramid Texts, Osiris, ba, Anubis