geminate (adj.) Look up geminate at Dictionary.com
"duplicated, found in pairs," early 15c., from Latin geminatus "twinned, equal," past participle of geminare "to double, repeat," related to geminus "twin, born together; paired, double," perhaps from PIE *yem- "to pair." As a verb, from 1630s. Related: Geminated; geminating; geminative. Gemmels (plural) was Middle English for "twins" (latge 14c.), also "Gemini," from Old French gemeles; hence also gemel ring, a double-ring that may be taken apart.