radius: Meaning and Definition of
Pronunciation: (rā'dē-us), [key]
— pl. -di•i -di•us•es.
- a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter.
- the length of such a line.
- any radial or radiating part.
- a circular area having an extent determined by the length of the radius from a given or specified central point: every house within a radius of 50 miles.
- a field or range of operation or influence.
- extent of possible operation, travel, etc., as under a single supply of fuel: the flying radius of an airplane.
- the bone of the forearm on the thumb side. Cf.(def. 1). See diag. under
- a corresponding bone in the forelimb of other vertebrates.
- the throw of an eccentric wheel or cam.
- a rounded corner or edge on a machined or cast piece of metal.
- one of the principal longitudinal veins in the anterior portion of the wing of an insect.
- radius (Thesaurus)