twin
noun
[ twɪn ]
• one of two children or animals born at the same birth.
• "experiments were carried out using sets of identical twins"
Similar:
identical twins,
non-identical twins,
fraternal twins,
monozygotic/monozygous twins,
dizygotic/dizygous twins,
Siamese twins,
• something containing or consisting of two matching or corresponding parts.
twin
adjective
• forming, or being one of, a pair born at one birth.
• "she gave birth to twin boys"
twin
verb
• link (a town or district) with another in a different country or cause (two towns or districts) to be linked, for the purposes of friendship and cultural exchange.
• "the Russian city of Kostroma is twinned with Durham"
Origin:
late Old English twinn ‘double’, from twi- ‘two’; related to Old Norse tvinnr . Current verb senses date from late Middle English.