R Medical Abbreviation

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.

Radical

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

Rubber

Steel block with rounded face and wooden handle Used for rubbing down seams in canvas after they have been sewn. 'Rubbing Piece'.

Reject

Relaxed

Residential

River

In geology, saltation is a specific type of particle transport by fluids such as wind or water. It occurs when loose material is removed from a bed and carried by the fluid, before being transported back to the surface. Examples include pebble transport by rivers, sand drift over desert surfaces, soil blowing over fields, or even snow drift over smooth surfaces such as those in the Arctic or Canadian Prairies.

Right

A short-lived (typically less than 90 days) call option for purchasing additional stock in a firm, issued by the firm to all its shareholders on a pro rata basis.

Rectum

The rectum is the final straight portion of the large intestine in some mammals, and the gut in others. The human rectum is about 12 centimetres long, and begins at the rectosigmoid junction, at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used.