Found 2 items, similar to reactive.
English → English (WordNet) Definition: reactive 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
English → English (gcide) Definition: Reactive 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]