sesquipedalian

ses·qui·pe·da·lian  (sskw-p-dlyn)

n.

A long word.

adj.

1. Given to the use of long words.

2. Long and ponderous; polysyllabic.

Thesaurus

Noun	1.	sesquipedalian - a very long word (a foot and a half long) sesquipedalia polysyllabic word, polysyllable - a word of more than three syllables
Adj.	1.	sesquipedalian - given to the overuse of long words; "sesquipedalian orators"; "this sesquipedalian way of saying one has no money" pretentious - making claim to or creating an appearance of (often undeserved) importance or distinction; "a pretentious country house"; "a pretentious fraud"; "a pretentious scholarly edition"
	2.	sesquipedalian - (of words) long and ponderous; having many syllables; "sesquipedalian technical terms" polysyllabic long - primarily spatial sense; of relatively great or greater than average spatial extension or extension as specified; "a long road"; "a long distance"; "contained many long words"; "ten miles long"