'Diametral planes' definitions:

Definition of 'Diametral planes'

From: GCIDE
  • Diametral \Di*am"e*tral\, a. [Gr. F. diam['e]tral.] Pertaining to a diameter; diametrical. [1913 Webster]
  • Diametral curve, Diametral surface (Geom.), any line or surface which bisects a system of parallel chords drawn in a curve or surface.
  • Diametral planes (Crystal.), planes in which two of the axes lie. [1913 Webster]