diameter

Meaning

Noun

• Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.
• The length of such a line.
• The maximum distance between any two points in a metric space
• The maximum eccentricity over all vertices in a graph.

Origin

• From Old French diametre (French diamètre), from Latin diametrus, from Ancient Greek διάμετρος (γραμμή) (diametros grammē, “line measuring across”), from διά + μέτρον.