reactive

Adjective
US[ree-ak-tiv]/riˈæktɪv/3 syllables
Synonyms: responsive

Open English WordNet

Adjective (2)

  1. participating readily in reactions“sodium is a reactive metal”“free radicals are very reactive”Opposite unreactiveSimilar unstable, activated, thermolabile, labile, oxidizable
  2. reacting to a stimulus“the skin of old persons is less reactive than that of younger persons”Synonyms: responsiveOpposite insensitiveSimilar sensitive

Related words reactivity noun, react verb, responsiveness noun

Word of the day · Sep 28About this word
onerousadjective

What does it mean? Question 1 of today’s quiz

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Webster's Dictionary (1913)

Re·act′ive (rē-ăkt′ĭv), adjective

Origin: Cf. F. réactif.

Having power to react; tending to reaction; of the nature of reaction. — Re·act′wb-a1′>′ive·ly, adverb — Re·act′wb-a1′>′ive·ness, noun

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54

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