(pathology) An inherited condition in which the exocrine glands produce abnormally viscous mucus, causing chronic respiratory and digestive problems.

Of or relating to cytology.

(biology) the transmission of hydrogen from water to carbohydrates etc and back to water by living organisms

carbon-nitrogen-oxygen cycle

(physics, astronomy) A group of nuclear reactions, that involve the interaction of protons with carbon, nitrogen and oxygen nuclei, thought to be the main source of energy in main-sequence stars of greater than 1.4 solar mass.

Usage of Cyrillic letters in place of visually similar (though not necessarily phonetically similar) Roman letters in languages which use the Roman alphabet, to create a more 'Russian' feel for a text.

Of or pertaining to faux Cyrillic.

The basic thermodynamic cycle of the normal four-stroke internal combustion engine: isentropic compression, constant-volume heat addition, isentropic expansion, and constant-volume heat rejection.

(business) The business cycle from startup of operations to the profit; from obtaining the raw material, through designing and production, to the distribution and profits.

The physical cycle of carbon through the Earth’s biosphere, geosphere, hydrosphere and atmosphere that includes such processes as photosynthesis, decomposition, respiration and carbonification.