| radius | (noun) support consisting of a radial member of a wheel joining the hub to the rim | Synonyms: spoke, wheel spoke |
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| (noun) the length of a line segment between the center and circumference of a circle or sphere | Synonyms: r |
| (noun) the outer and slightly shorter of the two bones of the human forearm | - |
| (noun) a circular region whose area is indicated by the length of its radius | - |
| (noun) a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere) | - |
| sardius | (noun) a deep orange-red variety of chalcedony | Synonyms: sard, sardine |
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