The Collaborative International Dictionary of English v.0.48:
Proparoxytone \Pro`par*ox"y*tone\, n. [Gr. ?. See Pro-, and Paroxytone.] (Gr. Gram.) A word which has the acute accent on the antepenult. [1913 Webster]WordNet (r) 3.0 (2006):
proparoxytone n 1: word having stress or acute accent on the antepenult