radiusnoun [ C ]
uk/ˈreɪ.di.əs/us/ˈreɪ.di.əs/plural radiiradius noun [ C ] (DISTANCE)
(the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface:
The radius of this wheel is 30 cm..
This wheel has a radius of 30 cm.
a distance from a central point:
The station, shopping centre and school lie within a one-mile radius of the house.
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Geometry: parts of geometrical shapes
- angle
- axes
- circumference
- corresponding sides
- crosswise
- diameter
- frustum
- hemisphere
- hypotenuse
- inclination
- line
- line segment
- node
- perimeter
- plane
- quadrant
- section
- side
- sin 1
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Measurements in general
radius noun [ C ] (BONE)
specialized anatomy the thicker of the two bones in the lower arm
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The arm
- acromial
- acromioclavicular
- acromion
- alar
- anconeus
- appendage
- cubital
- elbow
- glenohumeral
- glenoid
- infraglenoid
- infraspinatous
- subscapularis
- supraclavicular
- supraglenoid
- suprascapular
- supraspinatous
- triceps
- ulna
- underarm
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You can also find related words, phrases, and synonyms in the topics:
Bone structures