der Zwilling

1. 1

   twin — male or female; the feminine form Zwillingin is rare

   • Tom und Maria sind Zwillinge.

     Tom and Mary are twins.

     Tatoeba · Pfirsichbaeumchen · CC BY 2.0 FR

   • Tom und ich sind Zwillinge.

     Tom and I are twins.

     Tatoeba · Luiaard · CC BY 2.0 FR

2. 2

   twin — used as a component in numerous compound words such as Zwillingstürme (“Twin Towers”), with (one or more) or without hyphens depending on the word's length and the taste of the writer

Forms in lighter type are derived by the standard declension rules from the nominative, genitive and plural.