Diametral /(?)/

Di·am·e·tral

Diametral

a.
  1. Pertaining to a diameter; diametrical.

Phrases & Compounds
Diametral curve
any line or surface which bisects a system of parallel chords drawn in a curve or surface.
Diametral planes
planes in which two of the axes lie.

Diametral

n.
  1. A diameter. [Obs.]