the movement of something around a system or place

plural of circulating medium

(economics) Forms of money that pass from hand to hand, such as coins and banknotes.

(historical) A library that circulated books among feepaying subscribers.

plural of circulating library

plural of circulating medium

(meteorology) The circulation of air in a Hadley cell.

Any of the global circulatory currents, such as the Gulf Stream, that are driven by differences in temperature and salinity.

a form of cylindrical motion found in the near-surface waters of lakes and oceans under windy conditions, characterized by lines or streaks of seaweed etc (called windrows) roughly parallel to the wind

(anatomy) The circulation of blood through a network of vessels that is developed through enlargement of secondary vessels and use of existing anastomoses between adjacent vessels when a major vein or artery is functionally impaired, as by obstruction.