What does RAD stand for?

Royal Academy of Dancing

Radar

Acronym for RAdio Detection And Ranging. An electronic system designed to transmit radio signals and receive reflected images of those signals from a 'target' in order to determine the bearing and distance to the 'target'.

Radial

Line from a VOR or NDB. For example, the 180 radial from a VOR represents a line south of that VOR. In a direction directly outward from the center of a circle or sphere or from the axis of a cylinder. The spokes of a wheel, for example, are radial. A magnetic bearing extending from a very high frequency omni-range and/or tactical air navigation station.

Radian

A radian is the angle with vertex at the center of a circle with radius r that encompasses an arc of length r.

Radiant

In optics, the point or object from which light proceeds. 2. In geometry, a straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve. 3. In astronomy, the point in the heavens from which a shower of meteors seems to proceed.

Radiation Assessment Detector

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

Radicicol

Radial Artery Cathetnr

Rxdian