1 a hand tool with a bit shaped like a corkscrew, for boring holes in wood
2 a larger tool of the same kind for boring holes in the ground (C15 an augur, resulting from mistaken division of earlier a nauger, from Old English nafugar nave (of a wheel) spear (that is, tool for boring hubs of wheels), from nafu nave2 + gar spear; see gore2)
n the emission of an electron instead of a photon by an excited ion as a result of a vacancy being filled in an inner electron shell
(C20: named after Pierre Auger (1899--1993), French physicist)
English Collins Dictionary - English Definition & Thesaurus
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