Sesquipedalian

sesquipedalian \ˌses-kwə-pə-ˈdāl-yən\ adjective: 1. having many syllables; long {sesquipedalian terms}, 2. given to or characterized by the use of long words {a sesquipedalian television commentator}

Etymology: Latin sesquipedalis, literally, a foot and a half long, from sesqui- + ped-, pes foot

Sesquipedalian is sesquipedalian.