Meaning & use
radii
Last updated
The plural of radius; straight lines from the center of a circle or sphere to its edge, or the corresponding measurements.
See it in a sentence
The two circles had radii of three and five centimeters.
Engineers calculated the radii of the pipe bends before installation.
A note on using this word
A Latin-derived plural; 'radiuses' is also an accepted English plural form.
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