As adjectives the difference between monadic and nonadic
is that monadic
is (philosophy) of or relating to a monad while nonadic
is of or pertaining to an nonad; ninefold.
(philosophy) of or relating to a monad
(biology) of or relating to the Monas genus of microorganisms
(mathematics) having an arity of one (taking a single argument or operand)
* monadic predicate logic
of or pertaining to an nonad; ninefold
*This word has been coined by allusion to tetradic, octadic etc, but has little usage.