(astronomy) The roughly 1460-year cycle between successive alignments of the first days of the Egyptian civil calendar and the observational Sothic year.

plural of Sothic cycle

plural of interval cycle

plural of virtuous cycle

Synonym of virtuous circle.

(electronics) The ratio between the amount of time in which the clock's signal is high and the clock's period.

(climatology) Any of the three cyclic variations in the Earth's orbit around the Sun, respectively the obliquity of its axis, the precession of the equinoxes, and the eccentricity of its orbit.

plural of Milankovitch cycle

(physiology) The repeating physiological changes that are influenced by hormones controlling reproduction in placental mammals other than human beings and greater apes.

(physiology) The cycle associated with the maturation of the oocyte and its discharge from the ovary, from where it passes through the oviduct to the uterus.