quartz-lamp

quartz lamp

noun
a lamp consisting of an ultraviolet light source, as mercury vapor, contained in a fused-silica bulb that transmits ultraviolet light with little absorption.

Origin:
1920–25

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
quartz lamp

noun
a mercury-vapor lamp that is enclosed in a quartz container instead of a glass container 
WordNet® 3.0, © 2006 by Princeton University.
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