Definition of diametral plane
1
: a plane bisecting a system of parallel chords of a quadric surface
specifically
: any plane through the center of a sphere
2
of a linear complex
: a plane conjugate to a point at infinity
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“Diametral plane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diametral%20plane. Accessed 20 May. 2022.
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