Diametric
/ˌdaɪ.əˈmɛt.ɹɪk/noun
Relating to a diameter or describing something completely opposite in position, nature, or effect.
Did you know?Its deepest root is Greek *metron* meaning “measure,” the same ancient root that gave us meter, metric, and symmetry—so even “opposites” are secretly built on measurement.
Etymological Timeline
Proto-Indo-European
PIE
*meh₁-
“to measure”
Ancient Greek
Greek
diametros
“a line passing through the center of a circle; from dia- “through” + metron “measure””
Late Latin
Latin
diametrus
“a diameter”
Middle French
Old French
diametre
“diameter”
Late 16th Century
English
diametric
“pertaining to a diameter; later, directly opposite or contradictory”