Meaning of reactivity

re•ac•tiv•i•ty

Pronunciation: (rē"ak-tiv'i-tē), [key]
— n.
  1. the quality or condition of being reactive.
  2. the relative capacity of an atom, molecule, or radical to undergo a chemical reaction with another atom, molecule, or compound.
  3. a measure of the deviation from the condition at which a nuclear reactor is critical.
  4. the ability of an antigen to combine with an antibody.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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