V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CMOS
       Complementary-symmetry Metal-Oxide Semiconductor (IC)


The Free On-line Dictionary of Computing (30 December 2018):

Complementary Metal Oxide Semiconductor
CMOS

    (CMOS) A semiconductor fabrication
   technology using a combination of n- and p-doped semiconductor
   material to achieve low power dissipation.  Any path through
   a gate through which current can flow includes both n and
   p type transistors.  Only one type is turned on in any
   stable state so there is no static power dissipation and
   current only flows when a gate switches in order to charge the
   parasitic capacitance.

   (1999-06-04)