syncategorematic
    adj 1: of a term that cannot stand as the subject or
           (especially) the predicate of a proposition but must be
           used in conjunction with other terms; "`or' is a
           syncategorematic term" [ant: categorematic]

Syncategorematic \Syn*cat`e*gor`e*mat"ic\, a. [Gr. ?; sy`n with
   + ? a predicate. See Syn-, and Categorematic.] (Logic)
   Not capable of being used as a term by itself; -- said of
   words, as an adverb or preposition.
   [1913 Webster]