"sodomy of a man with a boy," c. 1600, from French pédérastie or directly from Modern Latin p?derastia, from Greek paiderastia "love of boys," from paiderastes "pederast, lover of boys," from pais (genitive paidos) "child, boy" (see pedo-) + erastes "lover," from erasthai "to love" (see Eros).