re·ac·tive (r - k t v)adj. 1. Tending to be responsive or to react to a stimulus. 2. Characterized by reaction. 3. Chemistry & Physics Tending to participate readily in reactions. re·ac tive·ly adv.re·ac tive·ness, re ac·tivi·ty n. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | reactivity - responsive to stimulation sensitivity, sensitiveness, sensibility - (physiology) responsiveness to external stimuli; the faculty of sensation; "sensitivity to pain" excitability, irritability - excessive sensitivity of an organ or body part |
| 2. | reactivity - ready susceptibility to chemical change susceptibility, susceptibleness - the state of being susceptible; easily affected |
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