World English Dictionary
semiconductor (ˌsɛmɪkənˈdʌktə)
1.  a substance, such as germanium or silicon, that has an electrical conductivity that increases with temperature and is intermediate between that of a metal and an insulatorThe behaviour may be exhibited by the pure substance (intrinsic semiconductor) or as a result of impurities (extrinsic semiconductor)
2.  a.  a device, such as a transistor or integrated circuit, that depends on the properties of such a substance
 b.  (as modifier): a semiconductor diode

Collins English Dictionary - Complete & Unabridged 10th Edition
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