Definition of polyadic in English:

polyadic

adjective

  • Involving three or more quantities, elements, or individuals.

    ‘the study of polyadic interactions in baboons’
    • ‘We propose a generalization of Sahlqvist formulae to polyadic modal languages by representing modal polyadic languages in a combinatorial style.’
    • ‘Post is best known for his work on polyadic groups, recursively enumerable sets, and degrees of unsolvability, as well as for his contribution to the unsolvability of problems in combinatorial mathematics.’

Origin

Early 20th century: from poly- ‘many’, on the pattern of words such as dyadic, monadic.

Pronunciation:

polyadic

/ˌpɒlɪˈadɪk/