(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 cycle of the thickening of the uterine lining in anticipation of an embryo implantation.

(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.

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

plural of cycle rickshaw

A rickshaw, mostly used as taxi, with two wheels in the back for the carriage and one wheel for steering in the front (or sometimes vice versa), propelled by the action of a driver’s feet upon pedals.

The cyclic movement of phosphorus through the biogeochemical environment

plural of cycle path