The Collaborative International Dictionary
Sesquipedalism
Sesquipedalianism \Ses`qui*pe*da"li*an*ism\, Sesquipedalism \Ses*quip"e*dal*ism\, n. Sesquipedality.
Wiktionary
sesquipedalism
n. (context rare English) (alternative form of sesquipedalianism English)