reaction

• Chemical reaction
• Nuclear reaction
• Reaction (physics), as defined by Newton's third law
• Chain reaction (disambiguation)

• Adverse drug reaction
• Allergic reaction
• Reflex, neural reaction
• Hypersensitivity, immune reaction
• Intolerance (disambiguation)
• Light reaction (disambiguation)

• Emotional, reaction
• Reactivity
• Proactivity, opposite of reactive behaviour
• Reactive attachment disorder

• Reactionary, a political tendency
• Reaction video
• Commentary (disambiguation)

• Reaction (album), a 1986 album by American R&B singer Rebbie Jackson
• "Reaction" (song), the title song from the Rebbie Jackson album
• "Reaction", a single by Dead Letter Circus
• Reactions, a 2018 album by The Mods
• ReAction GUI, a GUI toolkit used on AmigaOS
• Reaction.life, a political news and commentary website edited by Iain Martin
• Reaction Records, a record label
• TNA Reaction, a former documentary show of TNA Wrestling (now known as Impact Wrestling) behind the scenes
• Reaction (The Spectacular Spider-Man), an episode of the American animated television series The Spectacular Spider-Man
• The Reaction, a novel in the Animorphs series
• Reactions (journal), a chemistry journal published by MDPI

• Action (disambiguation)
• Stimulus (disambiguation)
• Thermidorian Reaction

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