The Collaborative International Dictionary of English v.0.48:
Pederastic \Ped`er*as"tic\, a. [Gr. paiderastiko`s.] Of or pertaining to pederasty. [1913 Webster]WordNet (r) 3.0 (2006):
pederastic adj 1: of homosexuality between a man and a boy [syn: pederastic, paederastic]