CIR Scientific & Educational Abbreviation

Circa

Circuit

An electrical arrangement requiring a source of voltage, a closed loop of wiring, an electric load and some means for opening and closing it. Or Optimum fire rating issued by Underwriter's Laboratories on roofing. The building codes in some areas require this type of roofing for fire safety. or The path of electrical flow from a power source through an outlet and back to ground.

Circle

Plane figure bounded by a line that, at all points, is equidistant from a point termed the 'Center' Can be considered as the section of a sphere by a plane Word is frequently applied to its circumference, as in 'position circle'

Circulate

Establishing flow down the tubing or drill pipe and up the annulus. Reverse circulating involves injecting down the annulus and up the drill pipe.

Committed Information Rate (Frame Relay)

Circinus

Committed Information Rate