Englishfor English speakers
yttrium
Noun
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Yttrium is a metallic element with an atomic number of 39 and symbol Y.
aluminate
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noun
a compound of alumina and a metallic oxide
laser
Noun
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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
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The term laser originated as an acronym for "light amplification by stimulated emission of radiation".