Gray.7. A bicycle or tricycle, or other light
velocipede.
Calippic cycle,
a period of 76 years, or
four Metonic cycles; -- so called from Calippus, who proposed it
as an improvement on the Metonic cycle. --
Cycle of
eclipses,
a period of about 6,586 days, the time of
revolution of the moon's node; -- called Saros by the
Chaldeans. --
Cycle of indiction,
a
period of 15 years, employed in Roman and ecclesiastical
chronology, not founded on any astronomical period, but having
reference to certain judicial acts which took place at stated
epochs under the Greek emperors. --
Cycle of the
moon,
or Metonic cycle,
a
period of 19 years, after the lapse of which the new and full
moon returns to the same day of the year; -- so called from
Meton, who first proposed it. --
Cycle of the
sun,
Solar cycle,
a period of 28
years, at the end of which time the days of the month return to
the same days of the week. The dominical or Sunday
letter follows the same order; hence the solar cycle
is also called the cycle of the Sunday letter. In the
Gregorian calendar the solar cycle is in general
interrupted at the end of the century.
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