Meaning

noun the length of a straight line passing through the center of a circle and connecting two points on the circumference

noun a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)

originEtymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwísder. Ancient Greek διά (diá) Ancient Greek δῐᾰ- (dĭă-) Proto-Indo-European *meh₁- Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Hellenic *-tron Ancient Greek -τρον (-tron) Ancient Greek μέτρον (métron) Ancient Greek διάμετρος (diámetros)bor. Latin diametros Old French diametre English diameter From Old French diametre…

Etymology from Wiktionary, CC BY-SA 3.0