Relating to or consisting of a duad; having the characteristics of a pair or two-part structure.
From 'duad' plus the adjective suffix '-ic,' creating an adjective form that appeared in English scholarly writing in the 18th-19th centuries for discussing mathematical and philosophical concepts involving pairs.
The word 'duadic' is beloved by mathematicians and philosophers but almost unknown to regular people—it's a perfect example of how academic fields create fancy adjectives (duadic, triadic, dyadic) for concepts that could simply be called 'paired' or 'two-part.'
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