sesquipedality

from WordNet (r) 3.0 (2006)

sesquipedality
    n 1: using long words

from The Collaborative International Dictionary of English v.0.48

Sesquipedality \Ses`qui*pe*dal"i*ty\, n.
   1. The quality or condition of being sesquipedal. --Sterne.
      [1913 Webster]

   2. The use of sesquipedalian words; style characterized by
      the use of long words; sesquipedalism.
      [1913 Webster]