blu-ray disc

Blu-ray

[bloo-rey]
Trademark.
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

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
Blu-ray
 
n
trademark an optical disk used to store digital information such as high-definition video, and able to store more information than a standard DVD
 
[C21: from the colour of the laser used to read and write this type of disc]

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