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Diameter
01
a straight line from one side of a round object, particularly a circle, passing through the center and joining the other side
Examples
The diameter of a circle is the longest distance between any two points on its circumference, passing through the center.
To calculate the circumference of a circle, you need to know its diameter and use the formula π × diameter.
02
a unit of linear measurement used to express magnifying power
Examples
The microscope had a diameter of 100×.
Telescopes are often rated in diameters.
Lexical Tree
diametral
diametrical
semidiameter
diameter
