from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun One that reacts to a stimulus.
  • noun Electronics A circuit element, such as a coil, used to introduce reactance.
  • noun A chemical reactor.
  • noun A nuclear reactor.

from The Century Dictionary.

  • noun One who or that which reacts; specifically: In electricity, a reactive coil.
  • noun In experimental psychology, the observer in a reaction experiment; the person who executes a movement in response to a prearranged sensory stimulus.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Elec.) A choking coil.
  • noun A nuclear reactor.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A person who behaves in response to a suggestion, stimulation or some other influence.
  • noun A structure used to contain chemical or other reactions.
  • noun nuclear physics A device which uses atomic energy to produce heat.
  • noun chemistry A chemical substance which responds to the presence or contact with another substance.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
  • noun an electrical device used to introduce reactance into a circuit


Sorry, no etymologies found.


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