reaction

reaction

See also: réaction and reäction

English

Alternative forms

• reäction (rare)

Etymology

Old French reaction, from Latin reāctiō, from the verb reagō, from re- (“again”) + agō (“to act”); more at re-, action; equivalent to react +‎ -ion.

Pronunciation

• Audio (US)

  (file)

• IPA^(key): /ɹiˈækʃən/
• Rhymes: -ækʃən

Noun

reaction (plural reactions)

1. An action or statement in response to a stimulus or other event.

   The announcement of the verdict brought a violent reaction.

   You were in the courtroom. What is your reaction?

   When I last tried to eat strawberries I had a terrible allergic reaction.

2. (chemistry) A transformation in which one or more substances is converted into another by combination or decomposition.

   In this reaction, the acid and base will neutralize each other, producing a salt.

3. (politics) Reactionary politics; a period in which reactionary thought or politics is resurgent or dominant.
4. (Internet) An icon or emoji appended to a posted message by a user to express their feeling about it.

Synonyms

• reax (journalism jargon)
• rxn (abbreviation)

Derived terms

• Boudouard reaction
• Briggs-Rauscher reaction
• Finkelstein reaction
• overreaction
• reaction rate constant

Related terms

• chain reaction
• mixed reactions
• react
• reactant
• reactionary
• reaction time
• reactor
• reactional

Translations

action in response to an event

Afrikaans: reaksie Albanian: reagim (sq) m Arabic: رَدّ فِعْل‎ m (radd fiʿl), تَفَاعُل‎ m (tafāʿul) Armenian: ռեակցիա (hy) (ṙeakcʿia) Azerbaijani: reaksiya, əksüləməl, təpki Belarusian: рэа́кцыя f (reákcyja) Bengali: প্রতিক্রিয়া (prôtikriya) Bulgarian: реа́кция (bg) f (reákcija) Catalan: reacció (ca) f Chinese: Mandarin: 反應／反应 (zh) (fǎnyìng), (political) 反動／反动 (zh) (fǎndòng) Czech: reakce (cs) f Danish: reaktion (da) c Dutch: reactie (nl) f Esperanto: reakcio, reago Estonian: reaktsioon Finnish: reaktio (fi), vaikutus (fi), vastavaikutus (fi), vaste (fi) (medicine) French: réaction (fr) f Galician: reacción (gl) f Georgian: რეაქცია (reakcia) German: Reaktion (de) f Greek: αντίδραση (el) f (antídrasi) Hebrew: תְּגוּבָה‎ (he) f (t'guvá) Hindi: प्रतिक्रिया (hi) f (pratikriyā), प्रक्रिया (hi) f (prakriyā) Hungarian: reakció (hu) Indonesian: reaksi (id) Irish: frithghníomhaíocht f Italian: reazione (it) f Japanese: 反応 (ja) (はんのう, hannō), (political) 反動 (ja) (はんどう, handō) Kazakh: реакция (reaksiä) Khmer: ប្រតិកម្ម (km) (praʼtekam) Korean: 반응(反應) (ko) (baneung), (political) 반동(反動) (ko) (bandong) Kyrgyz: реакция (ky) (reaktsiya) Lao: ປະຕິກິລິຍາ (pa ti ki li nyā), ປະຕິກິຣິຍາ (pa ti ki ri nyā) Latin: reāctiō f (Medieval or New Latin) Latvian: reakcija f Lithuanian: reakcija (lt) f Luxembourgish: Reaktioun f Macedonian: реакција f (reakcija) Malay: reaksi, tindak balas (ms) Maltese: reazzjoni f Mongolian: Cyrillic: урвал (mn) (urval) Norwegian: Bokmål: reaksjon (no) m Nynorsk: reaksjon m Persian: واکنش‎ (fa) (vâkoneš), رآکسیون‎ (reâksyon) Polish: reakcja (pl) f Portuguese: reação (pt) f Punjabi: ਰੇਅਕ੍ਤਿਓਨ f (reaktiona) Romanian: reacția f, reacție (ro) m Russian: реа́кция (ru) f (reákcija) Sanskrit: प्रतिक्रिया (sa) f (pratikriyā), प्रक्रिया (sa) f (prakriyā) Serbo-Croatian: Cyrillic: реа̀кција f Roman: reàkcija (sh) f Slovak: reakcia f Slovene: reakcija f Spanish: reacción (es) f Swahili: mmenyuko Swedish: reaktion (sv) c Tagalog: reaksyon Tajik: таассур (taassur), реаксия (reaksiya), вокуниш (vokuniš) Telugu: ప్రతిచర్య (praticarya), ప్రతిక్రియ (te) (pratikriya) Thai: ปฏิกิริยา (th) (bpà-dtì-gì-rí-yaa) Turkish: tepki (tr), reaksiyon (tr) Turkmen: reaksiýa Ukrainian: реа́кція f (reákcija) Uzbek: reaksiya (uz), sezish (uz) Vietnamese: phản ứng (vi) (反應) Welsh: adwaith (cy) m

chemical transformation

Afrikaans: reaksie Arabic: تَفَاعُل‎ m (tafāʿul) Armenian: փոխազդեցություն (hy) (pʿoxazdecʿutʿyun), ռեակցիա (hy) (ṙeakcʿia) Belarusian: рэа́кцыя f (reákcyja) Bulgarian: реа́кция (bg) f (reákcija) Catalan: reacció (ca) f Chinese: Mandarin: 反應／反应 (zh) (fǎnyìng) Czech: reakce (cs) f Danish: reaktion (da) c Finnish: reaktio (fi) French: réaction (fr) f German: Reaktion (de) f Icelandic: hvörf n pl, hvarf n Irish: imoibriú m Italian: reazione (it) Japanese: 反応 (ja) (はんのう, hannō) Kazakh: реакция (reaksiä) Korean: 반응(反應) (ko) (baneung) Luxembourgish: Reaktioun f Malay: tindak balas (ms), reaksi Maori: tauhohenga Norwegian: Bokmål: reaksjon (no) m Nynorsk: reaksjon m Portuguese: reação (pt) f Russian: реа́кция (ru) f (reákcija) Spanish: reacción (es) Tagalog: balibilos Telugu: చర్య (te) (carya) Thai: ปฏิกิริยา (th) (bpà-dtì-gì-rí-yaa) Ukrainian: реа́кція f (reákcija) Vietnamese: phản ứng (vi) (反應) Welsh: adwaith (cy) m

reactionary politics

Bulgarian: реакционерство n (reakcionerstvo) Finnish: taantumus (fi) German: Reaktion (de) f Hungarian: reakció (hu)

Anagrams

• actioner, actorine, anoretic, anticore, creation

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Interlingua

Noun

reaction (plural reactiones)

1. reaction

Related terms

• reactor
• reager