reaction

See also: réaction and reäction

English

Alternative forms

• reäction (rare)

Etymology

Inherited from Middle English reaccion, from 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. (Misesian praxeology, Austrian economics) Unpurposeful behavior.
5. (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

• Abderhalden reaction
• addition reaction
• alarm reaction
• alcohol flush reaction
• Appel reaction
• Arbuzov reaction
• Arndt-Eistert reaction
• Arthus reaction
• Asinger reaction
• Bamford-Stevens reaction
• Barton reaction
• Barton-Zard reaction
• Baylis-Hillman reaction
• Belousov-Zhabotinsky reaction
• Boudouard reaction
• Briggs-Rauscher reaction
• Bucherer reaction
• Bunsen reaction
• BZ reaction
• Cannizzaro reaction
• chain reaction
• chemical reaction
• click reaction
• combat stress reaction
• condensation reaction
• cortical reaction
• Curtius reaction
• cytotoxic reaction
• Darzens reaction
• dehydration reaction
• diazo reaction
• Diels-Alder reaction
• dissociation reaction
• Dötz reaction
• double replacement reaction
• double-replacement reaction
• electron transfer reaction
• elimination reaction
• Étard reaction
• Finkelstein reaction
• Friedel-Crafts reaction
• Gould-Jacobs reaction
• Grignard reaction
• gut reaction
• half-reaction
• haloform reaction
• heat of reaction
• Heck reaction
• Horner-Wadsworth-Emmons reaction
• Horner-Wittig reaction
• hunting reaction
• HWE reaction
• idiosyncratic reaction
• id reaction
• immune reaction
• in reaction
• insertion reaction
• Jarisch-Herxheimer reaction
• Knoevenagel reaction
• Kolbe reaction
• Kolbe-Schmitt reaction
• Kulinkovich reaction
• Lewis reaction
• Maillard reaction
• Mannich reaction
• Mazzotti reaction
• McCormack reaction
• Meerwein-Ponndorf reaction
• Michaelis-Arbuzov reaction
• Michael reaction
• Mitsunobu reaction
• mixed reaction
• mixed reactions
• Molisch reaction
• name reaction
• Norrish reaction
• nuclear reaction
• oscillatory reaction
• overreaction
• paradoxical rage reaction
• pericyclic reaction
• photochemical reaction
• photonuclear reaction
• polymerase chain reaction
• precipitation reaction
• Prevost reaction
• problem-reaction-solution
• protective reaction
• reaction control system
• reaction engine
• reaction GIF
• reaction image
• reaction mass
• reaction mechanism
• reaction mixture
• reaction rate constant
• reaction save
• reaction time
• reaction turbine
• reaction vessel
• reaction wheel
• reaction wood
• rearrangement reaction
• redox reaction
• Reformatsky reaction
• Reimer-Tiemann reaction
• Ritter reaction
• Sandmeyer reaction
• Schmidt reaction
• sequential reaction
• Simmons-Smith reaction
• SN1 reaction
• SN2 reaction
• Sonogashira reaction
• Stetter reaction
• Stille reaction
• substitution reaction
• Suzuki reaction
• thermite reaction
• Tsuji-Trost reaction
• Weiss-Cook reaction
• Wharton reaction
• Wittig reaction
• Wohl-Ziegler reaction
• Wulff-Dötz reaction
• Wurtz reaction
• Zincke reaction
• Zincke-Suhl reaction

 

Related terms

• react
• reactant
• reactionary
• reactor
• reactional

Translations

action in response to an event

• Afrikaans: reaksie
• Albanian: reagim (sq) m
• Arabic: رَدّ فِعْل m (radd fiʕl), تَفَاعُل m (tafāʕul)
• Armenian: ռեակցիա (hy) (ṙeakcʻia)
• Azerbaijani: reaksiya, əksüləməl, təpki
• Belarusian: рэа́кцыя f (reákcyja)
• Bengali: প্রতিক্রিয়া (bn) (protikriẏa)
• 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
• Marathi: प्रतिक्रिया (mr) f (pratikriyā)
• Mongolian:

  Cyrillic: урвал (mn) (urval)

• Norwegian:

  Bokmål: reaksjon (no) m

  Nynorsk: reaksjon m

• Persian: واکنش (fa) (vâkoneš), رآکسیون (re-âksyon)
• Polish: reakcja (pl) f
• Portuguese: reação (pt) f
• Romanian: reacție (ro) f
• 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,ymateb (cy) m

chemical transformation

• Afrikaans: reaksie
• Arabic: تَفَاعُل m (tafāʕul)
• Armenian: փոխազդեցություն (hy) (pʻoxazdecʻutʻyun), ռեակցիա (hy) (ṙeakcʻia)
• 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
• Greek: αντίδραση (el) f (antídrasi)
• 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
• Marathi: अभिक्रिया f (abhikriyā)
• Norwegian:

  Bokmål: reaksjon (no) m

  Nynorsk: reaksjon m

• Portuguese: reação (pt) f
• Romanian: reacție (ro) f
• Russian: реа́кция (ru) f (reákcija)
• Spanish: reacción (es)
• Tagalog: balibilos
• Telugu: చర్య (te) (carya)
• Thai: ปฏิกิริยา (th) (bpà-dtì-gì-rí-yaa)
• Turkish: tepkime (tr)
• Ukrainian: реа́кція f (reákcija)
• Vietnamese: phản ứng (vi) (反應)
• Welsh: adwaith (cy) m,ymateb (cy) m

reactionary politics

• Azerbaijani: irtica, reaksiya
• Bulgarian: реакционерство n (reakcionerstvo)
• Finnish: taantumus (fi)
• German: Reaktion (de) f
• Hungarian: reakció (hu)

Anagrams

• actioner, actorine, anoretic, anticore, creation

Interlingua

Noun

reaction (plural reactiones)

1. reaction

Related terms

• reactor
• reager