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diameter

di·am·e·ter

diameter

pronunciation:
daI ae mih tr
features:
Word Explorer, Word Parts
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.
derivation: diametral (adj.)
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  measurement, shape
Word Parts
The word diameter contains the following parts: