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gallium arsenide

noun, Chemistry.
a crystalline and highly toxic semiconductor, GaAs, used in light-emitting diodes, lasers, and electronic devices.
Origin of gallium arsenide
1960-65 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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gallium-arsenide in Science
gallium arsenide  
A dark-gray crystalline compound used in transistors, solar cells, and semiconductor lasers. Chemical formula: GaAs.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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