Subindex, Hyposeme
(cf. Index; see also Hypoicon)


"Subindices or hyposemes are signs which are rendered such principally by an actual connection with their objects. Thus a proper name, [a] personal demonstrative, or relative pronoun or the letter attached to a diagram, denotes what it does owing to a real connection with its object but none of these is an Index, since it is not an individual." ('A Syllabus of Certain Topics of Logic', EP 2:274, 1903)



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Abbreviations (CP, EP, etc.) and sources; see here