The Commens Dictionary
Quote from ‘Notes on Portions of Hume's "Treatise on Human Nature"’
…the division of signs according to their Monadic Objects is simply into 1st, Signs of Objects whose Being is Monadic (signs of qualities, etc), 2nd, Signs of Objects whose Being is Dyadic (signs of existents, past events, etc), 3rd, Signs of Objects whose Being is Triadic (Signs of Laws, Types, etc.). Names: Monadosemeion, Dyadosemeion, Triadosemeion.
MS [R] 939:48
‘Triadosemeion’ (pub. 13.10.15-13:48). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-notes-portions-humes-treatise-human-nature-18.