Antimony

n. metallic element (Chemistry)

Antimony (IPA: ) is a chemical element in the periodic table that has the symbol Sb (, meaning "mark") and atomic number 51. A metalloid, antimony has four allotropic forms. The stable form of antimony is a blue-white metalloid. Yellow and black antimony are unstable non-metals. Antimony is used in flame-proofing, paints, ceramics, enamels, a wide variety of alloys, electronics, and rubber.
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Noun
1. a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite
(synonym) Sb, atomic number 51
(hypernym) metallic element, metal
(substance-holonym) stibnite

(n.)
An elementary substance, resembling a metal in its appearance and physical properties, but in its chemical relations belonging to the class of nonmetallic substances. Atomic weight, 120. Symbol, Sb.
  

atomic symbol, Sb, antimony is the 51st element in the periodic table ( atomic number 51) with an atomic weight of 121.8. Antimony is a group V element making it a donor in silicon, i.e., makes silicon N-type. Antimony is a large atom with a low diffusivity in silicon and is commonly used as a buried layer dopant where low outgassing and up-diffusion are desired.