Meaning of the word radius in English

What does radius mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

radius

US /ˈreɪ.di.əs/

UK /ˈreɪ.di.əs/

a straight line from the center to the circumference of a circle or sphere

Example:

•

The radius of the circle is 5 cm.

•

Calculate the volume of the sphere given its radius.

Synonym:

semidiameter

the range or scope of something

Example:

•

The explosion had a destructive radius of 10 miles.

•

The store delivers within a 5-mile radius.

Synonym:

range scope area vicinity proximity