In Plato's dialogue Gorgias (at 494d) Socrates uses the term in a conversation with Callicles contrasting appetites and contentment.
The word appears widely but not necessarily frequently in the Latin literature of antiquity, from Plautus to Ausonius. It is sometimes a synonym for puer delicatus, "delicate boy". Cicero uses the term as an insult. The word became a general term for a boy groomed for sexual purposes.
C. S. Lewis in his partial autobiography Surprised by Joy described the social roles during his time at Wyvern College including the role of "Tart": "a pretty and effeminate-looking small boy who acts as a catamite to one or more of his seniors..." and noted that "pederasty...was not [frowned upon as seriously as] wearing one's coat unbuttoned." 
Anthony Burgess's 1980 novel Earthly Powers uses the word in its "outrageously provocative" opening sentence: "It was the afternoon of my eighty-first birthday, and I was in bed with my catamite when Ali announced that the archbishop had come to see me."
In the postapocalyptic landscape of Cormac McCarthy's novel The Road, the narrator describes an army on the move on foot with "women, perhaps a dozen in number, some of them pregnant, and lastly a supplementary consort of catamites." 
Look up catamite in Wiktionary, the free dictionary.
^Craig Williams, Roman Homosexuality (Oxford University Press, 1999, 2010), pp. 52–55, 75.
^ abCicero, frg. B29 of his orations and Philippics 2.77; Bertocchi and Maraldi, "Menaechmus quidam," p. 95.
^Alastair J.L. Blanshard, "Greek Love," in Sex: Vice and Love from Antiquity to Modernity (Wiley-Blackwell, 2010), p. 131. Both Servius, note to Aeneid 1.128, and Festus state clearly that Catamitus was the Latin equivalent of Ganymedes; Festus says he was the concubinus of Jove. Alessandra Bertocchi and Mirka Maraldi, "Menaechmus quidam: Indefinites and Proper Nouns in Classical and Late Latin," in Latin vulgaire–Latin tardif. Actes du VIIème Colloque international sur le latin vulgaire et tardif. Séville, 2–6 septembre 2003 (University of Seville, 2006), p. 95, note 16.
^Larissa Bonfante and Judith Swaddling, Etruscan Myths (University of Texas Press, 2006), p. 73.
^Surprised by Joy: The Shape of My Early Life, Chapter IV Bloodery, pp.83-84, C.S.Lewis