(ˈ)trī|adik, -dēk adjective
: having the characteristics of or constituting a triad : consisting of or involving a triad
a triadic poem
the triadic nature of color vision — Medical Physics
an erudite triadic biography of Lenin, Trotsky, and Stalin — R.A.Bauer
suggested the use of triadic definitions in which the verbal symbol is made responsible both to an object or field of objects and to a detailed description of the objects — C.W.Shumaker
thus language involves what logicians call a triadic relation. There is the speaker, the thing said, and the one spoken to — John Dewey
• tri·ad·i·cal·ly -də̇k(ə)lē, -dēk-, -li adverb