diameter

lat. diameter ‘Durchmesser’ ist (s. diametral).

Etymology

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

Pronunciation

• (Received Pronunciation) IPA^(key): /daɪˈæmɪtə(ɹ)/
• (General American) enPR: dī-ăm'ĭtər, IPA^(key): /daɪˈæmɪtɚ/, [-mɪɾɚ]

Audio (US)

Duration: 2 seconds.0:02

Noun

diameter (plural diameters)

1. (geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.
2. (geometry) The length of such a line.
3. (geometry) The maximum distance between any two points in a metric space
4. (graph theory) The maximum eccentricity over all vertices in a graph.