geminate
\JEM-uh-nit, -neyt\
adjective
1. Also, geminated. combined or arranged in pairs; twin; coupled.
verb
1. to make or become doubled or paired.
Quotes
The twins are a complete organism: they speak their own language, "Aeolian" (named after Aeolus, the wind god); their abiding interest is in their private game of Bep -- "the great geminate game" of lying entwined, head to tail, in an echo of their position in the womb.
-- Salman Rushdie, "The Stuff of Marvels," New York Times, October 4, 1981
Origin
Geminate is related to the Latin word for "twin," geminus. It entered English in the late 1500s.
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