reciprocal

adjective
re·​cip·​ro·​cal | \ ri-ˈsi-prə-kəl How to pronounce reciprocal (audio) \

Definition of reciprocal

 (Entry 1 of 2)

1a : inversely related : opposite
b : of, constituting, or resulting from paired crosses in which the kind that supplies the male parent of the first cross supplies the female parent of the second cross and vice versa
2 : shared, felt, or shown by both sides
3 : serving to reciprocate : consisting of or functioning as a return in kind the reciprocal devastation of nuclear war
4a : mutually corresponding agreed to extend reciprocal privileges to each other's citizens
b : marked by or based on reciprocity reciprocal trade agreements

reciprocal

noun

Definition of reciprocal (Entry 2 of 2)

1 : something in a reciprocal relationship to another
2 : either of a pair of numbers (such as ²/₃ and ³/₂ or 9 and ¹/₉) whose product is one broadly : multiplicative inverse

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Other Words from reciprocal

Adjective

reciprocally \ ri-​ˈsi-​prə-​k(ə-​)lē How to pronounce reciprocally (audio) \ adverb

Synonyms & Antonyms for reciprocal

Synonyms: Adjective

complementary, correlative, supplemental, supplementary

Antonyms: Adjective

noncomplementary, nonreciprocal

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Did You Know?

In Latin, reciprocus means "returning the same way" or "alternating". So in a reciprocating engine, like the one in your car, the pistons move back and forth, and that motion is transformed into the rotary motion of the crankshaft. A reciprocal is a pair of numbers (such as 5/6 and 6/5) that can be multiplied to produce 1. Reciprocity (with the accent on the third syllable) between two nations means they agree to recognize certain things granted in one country as being valid in the other—for example, your driver's license.

Examples of reciprocal in a Sentence

Adjective

the two nations agreed to give reciprocal work rights to each other's citizens, thus facilitating the daily border crossings of workers from both countries

Recent Examples on the Web: Adjective

Other women's wild cards went to Francesca Di Lorenzo, Whitney Osuigwe, Kristie Ahn and Katie Volynets of the U.S., along with 16-year-old Diane Parry of France, who got her country's reciprocal invitation. Howard Fendrich, sun-sentinel.com, "Delray Beach 15-year-old Coco Gauff gets U.S. Open wild-card entry," 13 Aug. 2019 Other women's wild cards went to Francesca Di Lorenzo, Whitney Osuigwe, Kristie Ahn and Katie Volynets of the U.S., along with 16-year-old Diane Parry of France, who got her country's reciprocal invitation. Howard Fendrich, courant.com, "15-year-old American Coco Gauff gets US Open wild-card entry," 13 Aug. 2019 This evening, the Trumps will host a reciprocal dinner for the royal family at the US ambassador's residence in London. Doug Criss, CNN, "5 things to know for June 4: Trump, tech probes, Virginia Beach, Sudan, lost climbers," 4 June 2019 Pulido’s hope is that the project is reciprocal — In Lak’ech. San Diego Union-Tribune, "Someone San Diego Should Know: Alberto Pulido," 29 July 2019 The study suggests that being married can diminish social connections; the unmarried, meanwhile, tend to exhibit greater social ties and reciprocal support with kin, neighbors, and friends (and this is even more so for men). Alan J. Hawkins, National Review, "What You Lose When You Diss the Public Good of Marriage," 10 July 2019 Less than a week later Eritrea’s president Isaias Afwerki made a reciprocal visit, landing in Addis Ababa to an equally rapturous welcome. Martin Plaut, Quartz Africa, "The glow of the historic accord between Ethiopia and Eritrea has faded," 9 July 2019 The reciprocal of 2 is \frac{1}{2}, since 2\times\frac{1}{2}=1. Quanta Magazine, "The (Imaginary) Numbers at the Edge of Reality," 25 Oct. 2018 In January, Stephen Biegun, Trump’s special representative for North Korea, first raised the possibility that the administration would have to take reciprocal steps in its dealings with North Korea. Noah Bierman, latimes.com, "Trump’s impromptu approach to North Korea divides his administration," 1 July 2019

Recent Examples on the Web: Noun

For now, one hint that TKV may have an edge is that the reciprocals of the series of angles produced by the model, unlike those in the older model, follow a nearly periodic progression. Quanta Magazine, "What’s the Magic Behind Graphene’s ‘Magic’ Angle?," 28 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reciprocal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of reciprocal

Adjective

1570, in the meaning defined at sense 1a

Noun

1570, in the meaning defined at sense 1

History and Etymology for reciprocal

Adjective

Latin reciprocus returning the same way, alternating

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More Definitions for reciprocal

reciprocal

adjective

English Language Learners Definition of reciprocal

used to describe a relationship in which two people or groups agree to do something similar for each other, to allow each other to have the same rights, etc.

reciprocal

noun
re·​cip·​ro·​cal | \ ri-ˈsi-prə-kəl How to pronounce reciprocal (audio) \

Kids Definition of reciprocal

: one of a pair of numbers (as 9 and ¹/₉, ²/₃ and ³/₂) whose product is one

reciprocal

adjective
re·​cip·​ro·​cal | \ ri-ˈsip-rə-kəl How to pronounce reciprocal (audio) \

Medical Definition of reciprocal

1 : inversely related
2