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   reciprocal

   /rɪˈsɪprəkl/

   adjective

   • 1. given, felt, or done in return: "she was hoping for some reciprocal comment or gesture" Similar given/felt in returncorrespondingrequitedreturnedreciprocated
   • 2. (of an agreement or obligation) bearing on or binding each of two parties equally: "the treaty is a bilateral commitment with reciprocal rights and duties" Similar mutualcommonsharedjointcorrespondingcorrelativegive-and-takeexchangedcomplementaryrare:reciprocatoryreciprocativecommutual
   • ▪ (of a pronoun or verb) expressing mutual action or relationship.
   • 3. (of a course or bearing) differing from a given course or bearing by 180 degrees: "he took up a reciprocal heading and dropped down to 2,000 ft"
   • 4. (of a quantity or function) related to another so that their product is unity.

   noun

   • 1. an expression or function so related to another that their product is unity; the quantity obtained by dividing the number one by a given quantity: "the compressibility is the reciprocal of the bulk modulus"
   • 2. a pronoun or verb expressing mutual action or relationship, e.g. each other, fight.

   Word Origin late 16th century: from Latin reciprocus (based on re- ‘back’ + pro- ‘forward’) + -al.

   Derivatives

   • 1. reciprocality noun
   • 2. reciprocally adverb

   Scrabble Points: 16

   • R

     1

   • E

     1

   • C

     3

   • I

     1

   • P

     3

   • R

     1

   • O

     1

   • C

     3

   • A

     1

   • L

     1

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