Sesquipedalian

ses-kwi-pē-dā′li-an, adj. containing a foot and a half: often humorously said of a very long word—also Ses′quipedal .— ns. Sesquipedā′lianism , Sesquipedal′ity . [L. sesquipedal is — sesqui , one-half more, pes , ped-is , a foot.]