Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

Dictionary Suite
Display options



reI di s
Word Combinations (noun), Word Explorer, Word Parts
part of speech: noun
inflections: radii, radiuses
definition 1: a straight line segment extending from the center to the surface of a sphere or from the center to the circumference of a circle.
definition 2: the length of a radius line segment; one half of the diameter.
a radius of five meters
definition 3: any structure that radiates from a central point or runs in the direction of a radius.
definition 4: a circular area specified by the length of a radius from a central point.
within a fifty-meter radius
definition 5: the field or extent of useful operation, influence, or jurisdiction.
the radius of the emperor's power
definition 6: the distance that a vehicle can travel with a single load of fuel.
definition 7: one of the two bones of the vertebrate forearm or lower forelimb. (Cf. ulna).
Word CombinationsSubscriber feature About this feature
Word Explorer
  measurement, shape
Word PartsSubscriber feature About this feature