Merriam-Webster's Collegiate Dictionary
semi·con·duc·tor
\\-ˈdək-tər\\ noun DATE 1838
: any of a class of solids (as germanium or silicon) whose electrical conductivity is between that of a conductor and that of an insulator in being nearly as great as that of a metal at high temperatures and nearly absent at low temperatures
semiconductor
1838, "material whose electrical conductivity is between that of a conductor and that of an insulator," from semi- + conductor. Modern very specific sense is recorded from 1931.
Oxford Advanced Learner's Dictionary-牛津双解-OALD7
semiconductorsemi·con·duct·or /
7semikEn5dQktE(r) /
noun (technical 术语)1. a solid substance that
conducts
electricity in particular conditions, better than
insulators
but not as well as
conductors
半导体2. a device containing a semiconductor used in
electronics
半导体装置 Webster's Third New International Dictionary, Unabridged
semi·conductor
\“+\
nounEtymology: semi- + conductor: one of a class of solids (as germanium, silicon) whose feeble electrical conductivity is neither metallic nor electrolytic — compare
conduction
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metal-oxide semiconductor