Resembling or having the nature of twins; characterized by a pairing or doubling of elements.
Formed from Latin 'gemini' plus English adjectival suffix '-ous' (full of, characterized by). This is a rare English formation from classical roots, combining ancient terminology with modern morphology.
This adjective is so rare that it almost disappeared from English, but it keeps showing up in obscure scientific and literary texts because scientists love these precise Latin-derived terms for describing matched pairs.
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