Reactive

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Reactive \Re*act"ive\ (r[-e]*[a^]kt"[i^]v), a. [Cf. F.
     r['e]actif.]
     Having power to react; tending to reaction; of the nature of
     reaction. -- {Re*act"ive*ly}, adv. -- {Re*act"ive*ness}, n.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  reactive
       adj 1: participating readily in reactions; "sodium is a reactive
              metal"; "free radicals are very reactive" [ant: {unreactive}]
       2: tending to react to a stimulus; "the skin of the geriatric
          is less reactive than that of younger persons"- Louis Tuft