The Commens Dictionary
Quote from ‘Fragments [R]’
All signs are divided by the logicians into names, propositions, and argumentations. A mental name, or what one thinks when one thinks of the meaning of a name, is called a Concept.
MS [R] 839
‘Concept’ (pub. 24.11.15-17:55). 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-fragments-r-1.