This pie has been cut along its diameter.
Diameter is defined as the length of a straight line through the center of a circle.
An example of a diameter is the length of a line sliced down the center of a pie.
- a line segment passing through the center of a circle, sphere, etc. from one side to the other
- the length of such a segment; width or thickness of a circular or spherical figure or object
- Optics the unit of measure of the magnifying power of a lens
Origin of diameterMiddle English and Old French diametre from Medieval Latin diametra from Classical Latin diametrus from Classical Greek diametros from dia-, through + metron, a measure: see meter
- Abbr. d or diam. Mathematics a. A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery.b. The length of such a segment.
- Thickness or width.
- A unit of magnification equal to the number of times an object's linear dimensions is increased by the magnifying apparatus.
Origin of diameterMiddle English diametre from Old French from Latin diametrus from Greek diametros (grammē) diagonal (line) dia- dia- metron measure ; see mē-2 in Indo-European roots.
- (geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.
- (geometry) The length of such a line.
- (geometry) The maximum distance between any two points in a metric space
- (graph theory) The maximum eccentricity over all vertices in a graph.