Di·am·e·tral a. 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.
Di·am·e·tral, n. A diameter. [Obs.]
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diametral
adj : related to or along a diameter; "the diametral plane" [syn:
diametric, diametrical]