nonad

plural nonads

1. rareSynonym of ennead (“collection or series of nine things”).

   The beginning, middle and end of the nonad forms a triad, […]

   2020, John Krey, The Structure of Knowledge Using Natural Patterns, page 3

   2 more examples

   By Trisection of the three sections of a Tripartite circle. Symbolical of a nonad or nine fold nature of the Deity.

   1891, The Yoga-vásishtha-mahárámáyana of Válmiki

   The nonuply perspective nonads of Milne are distinct from all cases of cyclic nonads given by the theory of section I. of this paper […]

   1921, Proceedings of the Edinburgh Mathematical Society, page 6

   Synonyms: ennead