Webster’s Revised Unabridged Dictionary · 1913
Properispomenon
Pro·per′i·spom′e·non (·spŏm′ē·nŏn), n.; pl. Properispomena (#). [NL., fr. Gr. προπερισπώμενον, fr. περισπᾶν to circumflex on the penult; πρό before + περισπᾶν to circumflex. See Perispomenon.] (Gr. Gram.) A word which has the circumflex accent on the penult.