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Blu-ray

[bloo-rey] /ˈbluˌreɪ/
Trademark.
1.
an optical disk or an optical disk format for the storage of high-definition video and audio, having a much larger capacity than a DVD:
video games on Blu-ray; Blu-ray movies.
Also called Blu-ray Disc.
Origin
Blu-, respelling of blue (from the blue-violet laser used to read the disk) + (optical) ray
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for blu-ray disc

Blu-ray

noun
1.
trademark an optical disk used to store digital information such as high-definition video, and able to store more information than a standard DVD
Word Origin
C21: from the colour of the laser used to read and write this type of disc
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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