YAG

noun
\ˈyag \

Definition of YAG 

: a synthetic yttrium aluminum garnet of marked hardness and high refractive index that is used especially as a gemstone and in laser technology

First Known Use of YAG

1964, in the meaning defined above

History and Etymology for YAG

yttrium aluminum garnet

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Time Traveler for YAG

The first known use of YAG was in 1964

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