How to Pronounce "radius"
word
/ˈɹeɪdiəs/
RAY-dee-us
/ɹˈeɪdɪəs/
RAY-dee-us
Definition
The straight line from the center of a circle to its edge. It can also refer to one of the two main bones in the forearm.
IPA Transcription
American English
/ˈɹeɪdiəs/
British English
/ɹˈeɪdɪəs/
Simplified Pronunciation
US
RAY-dee-us
UK
RAY-dee-us
Listen in Context
The radius of this circle is 5 centimeters.
My teacher explained what the radius means in geometry class.
She broke her radius while skating last year.
You can find the area of a circle if you know its radius.