51Թ

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paraxial

[par-ak-see-uhl]

adjective

Optics.

  1. making a small angle with and lying close to the axis of an optical system.

    paraxial ray.

paraxial

/ æˈæɪə /

adjective

  1. physics (of a light ray) parallel to the axis of an optical system

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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51Թ History and Origins

Origin of paraxial1

First recorded in 1860–65; par- + axial

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