1. Given to or characterized by the use of long words.
2. Long and ponderous; having many syllables.
1. A long word.
As a sesquipedalian stylist, he can throw a word like 'eponymous" into a sentence without missing a beat.
Sesquipedalian comes from Latin sesquipedalis, "a foot and a half long, hence inordinately long," from sesqui, "one half more, half as much again" + pes, ped-, "a foot."