How to pronounce radius
Say it like RAY-dee-us. Radius has three syllables, and the main stress falls on the first one (RAY).
VoiceSpeed
Click the play button next to American or British to hear how to pronounce radius. Choose Slow to hear each sound clearly.
US American/ˈreɪdiəs/RAY-dee-us
UK British/ˈreɪdɪəs/RAY-deers
- RAY
- dee
- us
- Main stress
- Lighter stress
- Unstressed
Radius pronunciation, sound by sound
Read the parts left to right, then blend them together without pausing.
- RAYSay this part loudest and longest. The vowel is the "ay" in day.
- deeKeep this part quick and light. The vowel is the "ee" in see.
- usKeep this part quick and light. The vowel is the relaxed "uh" in about.
American vs British pronunciation of radius
- American English uses 3 syllables and British English 2.
British respelling: RAY-deers.
What does radius mean?
noun
- the length of a line segment between the center and circumference of a circle or sphere
- a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
- a circular region whose area is indicated by the length of its radius“they located it within a radius of 2 miles”
Where does radius come from?
Borrowed from Latin radius (“ray”).
Similar and opposite words
Similar meaning
- r
Questions about saying radius
How do you pronounce radius?
Say RAY-dee-us. The American pronunciation is /ˈreɪdiəs/. In British English it is /ˈreɪdɪəs/. Press play above to hear it at normal speed or slowly.
How many syllables are in radius?
Radius has three syllables, and the main stress falls on the first one (RAY). Broken into parts: RAY · dee · us.
Is radius pronounced differently in British English?
Yes. American English uses 3 syllables and British English 2. The British form is /ˈreɪdɪəs/ (RAY-deers).