Reactive

//ɹiːˈæktɪv// adj

Definitions

Adjective
  1. 1
    That reacts or responds to a stimulus.
  2. 2
    That readily takes part in reactions.

    "francium is the most reactive of the alkali metals."

  3. 3
    Characterized by induction or capacitance rather than resistance.
  4. 4
    Reacting to the past rather than anticipating the future, not predictive.
Adjective
  1. 1
    participating readily in reactions wordnet
  2. 2
    reacting to a stimulus wordnet

Etymology

From react + -ive.

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