What does "diametral" mean?

Diametral: Pertaining to a diameter; diametrical. 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.

Additional senses

  1. 2.A diameter. [Obs.] Sir T. Browne.

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