Welsbach-burner meaning

wĕlz'băk', -bäk'
A trademark for a lamp consisting of a gas burner and a gauze mantle impregnated with cerium and thorium compounds that becomes incandescent when heated by the burner.
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A gas burner with a gauze mantle impregnated with thorium oxide and cerium oxide: when lighted, the gauze gives off an incandescent, greenish light.
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