noun Optics, Crystallography.
the part of a doubly refracted ray that has changed speed and vibrations in the principal plane of the crystal.
The Biggest Grammatical Mistakes In Songs We Love To SingYour favorite playlist is probably as full of simple spelling mistakes and hilarious grammatical errors as it is beloved hit songs.
Origin of extraordinary ray
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for extraordinary ray
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