WordReference Random House Unabridged Dictionary of American English © 2025
met′al ox′ide sem′iconductor, [Electronics.]
  1. Electronicsa three-layer sandwich of a metal, an insulator (usually an oxide of the substrate), and a semiconductor substrate, used in integrated circuits.
Also, met′al-ox′ide sem′iconductor. Abbr.: MOS
'metal oxide semiconductor' also found in these entries (note: many are not synonyms or translations):
CMOS - MOS

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