Definitions for radiusˈreɪ di əs; -diˌaɪ
Random House Webster's College Dictionary
ra•di•usˈreɪ di əs; -diˌaɪ(n.)(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.
Category: Math
the length of such a line.
Category: Math
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.
Category: Math
a field or range of operation or influence.
extent of possible operation, travel, etc., as under a single supply of fuel.
the bone of the forearm on the thumb side.
Category: Anatomy
a corresponding bone in the forelimb of other vertebrates.
Category: Zoology
Origin of radius:
1590–1600; < L: staff, rod, spoke, beam, ray1
Princeton's WordNet
radius, r(noun)
the length of a line segment between the center and circumference of a circle or sphere
radius(noun)
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
radius(noun)
a circular region whose area is indicated by the length of its radius
"they located it within a radius of 2 miles"
radius(noun)
the outer and slightly shorter of the two bones of the human forearm
spoke, wheel spoke, radius(noun)
support consisting of a radial member of a wheel joining the hub to the rim
Kernerman English Learner's Dictionary
radius(noun)ˈreɪ di əs
the distance from the center of a circle to the edge
Measure the radius.
radiusˈreɪ di əs
5 miles/10 miles/20km in any direction from a particular point
the evacuation of everyone within a 3-mile radius
Wiktionary
radius(Noun)
The long bone in the forearm, on the side of the thumb.
radius(Noun)
The lighter bone (or fused portion of bone) in the forelimb of an animal.
radius(Noun)
A line segment between any point on the circumference of a circle and its center/centre.
radius(Noun)
The length of this line segment.
Origin: From radius
Webster Dictionary
Radius(noun)
a right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere
Radius(noun)
the preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla
Radius(noun)
a ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2
Radius(noun)
the barbs of a perfect feather
Radius(noun)
radiating organs, or color-markings, of the radiates
Radius(noun)
the movable limb of a sextant or other angular instrument
Translations for radius
Kernerman English Multilingual Dictionary
radius(noun)
(pluralˈradiuses ) the area within a given distance from a central point
They searched within a radius of one mile from the school.
- radiusAfrikaans
- نِصْف القُطرArabic
- обхватBulgarian
- raioPortuguese (BR)
- okruhCzech
- der UmkreisGerman
- radius; afstandDanish
- ακτίναGreek
- radioSpanish
- raadiusEstonian
- برد؛ محدودهFarsi
- sädeFinnish
- rayonFrench
- רַדיוּסHebrew
- त्रिज्या, अर्धव्यासHindi
- unutar radijusaCroatian
- (ható)sugárHungarian
- radiusIndonesian
- radíusIcelandic
- raggioItalian
- 半径の描く範囲Japanese
- 반지름이 그리는 범위Korean
- spindulysLithuanian
- rādiussLatvian
- radiusMalay
- straalDutch
- omkrets, radiusNorwegian
- promień, zasięgPolish
- برد؛ محدودهPersian
- وړانګه (ددايرى)، شعاعPashto
- raioPortuguese
- razăRomanian
- район, пределыRussian
- okruhSlovak
- območjeSlovenian
- radijusSerbian
- radieSwedish
- ระยะห่างจากจุดศูนย์กลางThai
- yarı çapTurkish
- 範圍Chinese (Trad.)
- радіусUkrainian
- قطرUrdu
- phạm viVietnamese
- 半径, 范围Chinese (Simp.)
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