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ra·di·us
 radius
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- pronunciation:
- reI
di
 s
- features:
- Word Explorer, Word Parts
| part of speech: |
noun |
| inflections: |
radii, radiuses |
| definition 1: |
a straight line from the center to the edge of a circle or sphere.
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| definition 2: |
a circular area measured by the length of its radius.
There are no stores within a mile radius of my house. |
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