Thy word is a lamp unto my feet, and a light unto my path. Ps. cxix. 105.

Ages elapsed ere Homer's lamp appeared. Cowper.

Æolipile lamp, a hollow ball of copper containing alcohol which is converted into vapor by a lamp beneath, so as to make a powerful blowpipe flame when the vapor is ignited. Weale. -- Arc lamp (Elec.), a form of lamp in which the voltaic arc is used as the source of light. -- Dëbereiner's lamp, an apparatus for the instantaneous production of a flame by the spontaneous ignition of a jet of hydrogen on being led over platinum sponge; -- named after the German chemist Döbereiner, who invented it. Called also philosopher's lamp. -- Flameless lamp, an aphlogistic lamp. -- Lamp burner, the part of a lamp where the wick is exposed and ignited. Knight. -- Lamp fount, a reservoir for oil, in a lamp. -- Lamp jack. See 2d Jack, n., 4 (l) *** (n). -- Lamp shade, a screen, as of paper, glass, or tin, for softening or obstructing the light of a lamp. -- Lamp shell (Zoö]l.), any brachiopod shell of the genus Terebratula and allied genera. The name refers to the shape, which is like that of an antique lamp. See Terebratula. -- Safety lamp, a miner's lamp in which the flame is surrounded by fine wire gauze, preventing the kindling of dangerous explosive gases; -- called also, from Sir Humphry Davy the inventor, Davy lamp. -- To smell of the lamp, to bear marks of great study and labor, as a literary composition.