e·lec·tron·ics

[ih-lek-tron-iks, ee-lek-]
noun
( used with a singular verb ) the science dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors.

Origin:
1905–10; see electronic, -ics

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World English Dictionary
electronics (ɪlɛkˈtrɒnɪks, ˌiːlɛk-) [Click for IPA pronunciation guide]
 
n
1.  (functioning as singular) the science and technology concerned with the development, behaviour, and applications of electronic devices and circuits
2.  (functioning as plural) the circuits and devices of a piece of electronic equipment: the electronics of a television set

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Electronics is always a great word to know.
So is quincunx. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Etymonline
Word Origin & History

electronics
1910, from electronic; cf. also -ics. The science of how electrons behave in vacuums, gas, semi-conductors, etc.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Unplug all appliances, personal audio devices and electronics from the outlet
  while out sightseeing.
Find resources for recycling computers, televisions and other electronics.
Advanced automotive electronics used to mean digital dashboard displays or
  electronic fuel injection.
Heating and cooling, appliances and electronics account for more than half the
  energy used in an average household.
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