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Definition of antimony

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an·ti·mo·ny  audio  (nt-mn) KEY 

Symbol Sb
A metallic element having four allotropic forms, the most common of which is a hard, extremely brittle, lustrous, silver-white, crystalline material. It is used in a wide variety of alloys, especially with lead in battery plates, and in the manufacture of flame-proofing compounds, paint, semiconductor devices, and ceramic products. Atomic number 51; atomic weight 121.76; melting point 630.5°C; boiling point 1,380°C; specific gravity 6.691; valence 3, 5. See Table at element.

Middle English antimonie, from Medieval Latin antimnium, perhaps from Arabic al-'imid : al-, the + 'imid, antimony (perhaps from Greek stimmi)

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