noun (used with a singular verb)
the technology dealing with the design, development, and construction of electronic systems utilizing extremely small elements, especially solid-state devices employing microminiaturization.
Origin of microelectronics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(functioning as singular) the branch of electronics concerned with microcircuits
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper
The branch of electronics that deals with miniature components generally too small to be seen by the naked eye.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.