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mercury-vapor lamp

[mur-kyuh-ree-vey-per] /ˈmɜr kyə riˌveɪ pər/
noun, Electricity
1.
a lamp producing a light with a high actinic and ultraviolet content by means of an electric arc in mercury vapor.
Origin
1900-1905
1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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