microelectronics
Concise Oxford English Dictionary © 2008 Oxford University Press:
microelectronics/mʌɪkrəʊɪlekˈtrɒnɪks/
▶plural noun [usu. treated as sing.] the design, manufacture, and use of microchips and microcircuits.
– derivatives
microelectronic adjective.
microelectronic adjective.
'microelectronics' also found in these Oxford entries:

