(biology) of, relating to, or showing rhythmic behaviour with a period of 24 hours; especially of a biological process

(countable) A specific system of electrical circuits in a particular device; (uncountable) the design of such a system.

(US) An alcoholic beverage formed by fermenting cider (apple juice).

A small circle. / A ring (typically of gold or silver) worn as an ornament on the head. / A crown without arches or a covering. / A round body; an orb.

Cider (apple juice containing pulp) which has not been fermented and so is non-alcoholic.

(chemistry, physics) the differential absorption of left-handed and right-handed circularly polarized light

circularly polarized light

The Roman statesman and orator Mārcus Tullius Cicerō (106–43 BC). / A surname. / A town in Cook County, Illinois. / A town in Hamilton County, Indiana.

Partially or mostly burnt material that results from incomplete combustion of coal or wood etc. / An ember. / Slag from a metal furnace.

(transitive) To reduce to cinders. / (transitive) To cover with cinders.