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[trans-mit-er, tranz-] /trænsˈmɪt ər, trænz-/
a person or thing that transmits.
Also called transmitting set. Radio. a device for sending electromagnetic waves; the part of a broadcasting apparatus that generates and modulates the radiofrequency current and conveys it to the antenna.
the part of a telephonic or telegraphic apparatus that converts sound waves or mechanical movements into corresponding electric waves or impulses.
Biochemistry, neurotransmitter.
Origin of transmitter
1720-30; transmit + -er1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for transmitter
  • Visual and audio information is relayed back to a research team's base camp via radio transmitter for observation and recording.
  • It's designed to release at a designated time, and can be retrieved using radio transmitter tracking.
  • It would send a signal from the air down to the transmitter to the video deck.
  • To tap a certain microwave link, your opponents must be in the line of sight of the transmitter.
  • The wireless transmitter that sends the weather data to the display console consumes about eight milliwatts.
  • One, bupropion, is an anti depressant that blocks the effects of the neuro transmitter noradrenaline.
  • In fact, maybe these cars could be designed with a small transmitter that triggers the charger to come on when needed.
  • Virtually every piece of electrically powered equipment acts as a radio transmitter, whether it is supposed to or not.
  • In effect, the natural flow can be modulated to create a gigantic low-frequency radio transmitter.
  • No matter how powerful the transmitter, radio waves simply cannot produce ionising radiation.
British Dictionary definitions for transmitter


a person or thing that transmits
the equipment used for generating and amplifying a radio-frequency carrier, modulating the carrier with information, and feeding it to an aerial for transmission
the microphone in a telephone that converts sound waves into audio-frequency electrical signals
a device that converts mechanical movements into coded electrical signals transmitted along a telegraph circuit
(physiol) short for neurotransmitter
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
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Word Origin and History for transmitter

"apparatus for receiving radio signals," 1934, agent noun from transmit.

Online Etymology Dictionary, © 2010 Douglas Harper
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transmitter in Science
A device that converts sound, light, or electrical signals into radio, microwave, or other electrical signals of sufficient strength for the purpose of telecommunication. Compare receiver.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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