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"Germanium" Definition
noun
A brittle, crystalline, gray-white metalloid element, widely used as a semiconductor, as an alloying agent and catalyst, and in certain optical glasses. Atomic number 32; atomic weight 72.59; melting point 937.4°C; boiling point 2,830°C; specific gravity 5.323 (at 25°C); valence 2, 4. See Table at element.
A grayish-white hard brittle metalloid element that resembles silicon and is used especially in optical and semiconductor materials and as a catalyst .