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]

The Collaborative International Dictionary of English. 2000.

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