Schizophrenia symptoms seem to worsen and improve in cycles known as relapses and remissions.
They compete using a two-person cycle known as a tandem, with a sighted "pilot" in the front seat.
The Games took place in a four-year cycle known as the Olympiad, which was one of the ways the Greeks measured time.
The estrous cycle, also known as "season" or "heat" of a mare occurs roughly every 19-22 days and occurs from early spring into autumn.
The Akan people of West Africa have a 42-day cycle known as Adaduanan.
The number of sunspots visible on the Sun is not constant, but varies over an 11-year cycle known as the solar cycle.
Another type of lending has emerged to combat this vicious cycle, known as microlending.
The Babylonians discovered that lunar eclipses recurred in a repeating cycle known as a saros.
They produce their cooling effect via the "reverse-Rankine" cycle, also known as 'vapor-compression'.
Current vapor-compression chiller technology is based on the "reverse-Rankine" cycle known as vapor-compression.
