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di·am·e·ter
 diameter
- pronunciation:
- daI
ae
mih
t
 r
- features:
- Word Explorer
| part of speech: |
noun |
| definition 1: |
in geometry, a straight line passing through the center of a circle or sphere and having its ends on the circumference or surface.
The figure shows the circle's diameter. |
| definition 2: |
the length of the line that passes through the center of a circle or sphere and has its ends on the circumference or surface
To calculate the area of a circle, you need to know the diameter. |
| definition 3: |
the width of any approximately circular, spherical, or cylindrical object.
Earth has a diameter of about 8,000 miles, or 13,000 kilometers. |
| related words: |
bore, caliber |
| derivation: |
diametral (adj.) |
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