counterpart

plural counterparts

1. Either of two parts that fit together or otherwise complement one another.

   Near-synonyms: complement, mate

   2 more examples

   Those brass knobs and their hollow counterparts interlock perfectly.

   Mr. Obama never found a generational counterpart among conservatives in Congress like Paul D. Ryan or Eric Cantor; instead, there was a mutual animosity.

   2012 November 7, Matt Bai, “Winning a Second Term, Obama Will Confront Familiar Headwinds”, in New York Times

   Synonyms: complement, mate

2. lawA duplicate of a legal document.
3. One who or that which resembles another.
4. One who or that which has corresponding functions or characteristics.

   Her French counterpart attended the meeting via video call.

   4 more examples

   Near-synonyms: (each contextually synonymous) opposite number, counterparty, opponent, homolog, homotype, equivalent, partner, vis-à-vis

   The two companies are working together with their respective counterparts in Asia.

   Its incompleteness in this respect makes the timetable of less value than some of its Continental counterparts, such as the French Horaires Mayeux; nevertheless, it is fair value at 5s.

   1962 July, “Talking of Trains: The new all-line timetable”, in Modern Railways, page 10

   England's attacking impetus was limited to one shot from Lampard that was comfortably collected by keeper Iker Casillas, but for all Spain's domination of the ball his England counterpart Joe Hart was unemployed.

   2011 November 12, “International friendly: England 1-0 Spain”, in BBC Sport

   Synonyms: opposite number, counterparty, opponent, homolog, homotype, equivalent, partner, vis-à-vis

5. biologyEither half of a flattened fossil when the rock has split along the plane of the fossil.

present singular third person counterparts · participle present counterparting · participle past counterparted · past counterparted

1. transitiveTo counterbalance.