(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.

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

(biochemistry) A metabolic cycle of biochemical reactions, occurring in ureotelic organisms, in which highly toxic ammonia is converted to urea for excretion.

(sports, uncountable) A team sport, similar to traditional polo, except that bicycles are used instead of horses.

(cytology) The life cycle of eukaryotic cells from a quiescent beginning, growth, duplication of DNA followed by mitosis and division.

(biochemistry) The Krebs cycle.

(chemistry) The conversion of one enantiomer of a chemical compound into the other enantiomer and back again.