Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. responsiveness to stimulation
  • n. relative susceptibility to chemical reaction

from The Century Dictionary and Cyclopedia

  • n. The state of being reactive: the process or course of reaction, as from a diseased condition.

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

  • n. responsive to stimulation
  • n. ready susceptibility to chemical change

Etymologies

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