Difference between Radius and Radii

What is the difference between Radius and Radii?

Radius as a noun is the long bone in the forearm, on the side of the thumb. while Radii as a noun is the long bone in the forearm, on the side of the thumb.

Radius

Part of speech: noun

Definition: The long bone in the forearm, on the side of the thumb. The lighter bone (or fused portion of bone) in the forelimb of an animal. A line segment between any point on the circumference of a circle and its center/centre. The length of this line segment.

Radii

Part of speech: noun

Definition: The long bone in the forearm, on the side of the thumb.

We hope you now know whether to use Radius or Radii in your sentence.

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