WordWeb Online

1. Given to the overuse of long words
   "sesquipedalian orators"; "this sesquipedalian way of saying one has no money"
    
2. (of words) long and ponderous; having many syllables
   "sesquipedalian technical terms";
   - polysyllabic

1. A very long word (a foot and a half long)
   - sesquipedalia

Derived forms: sesquipedalians

See also: long, pretentious

Type of: polysyllabic word, polysyllable

Encyclopedia: Sesquipedalian