pederast
noun
ped·er·ast ˈpe-də-ˌrast 
: a man who desires or engages in sexual activity with a boy
pederastic
ˌpe-də-ˈra-stik
adjective pederasty
ˈpe-də-ˌra-stē
noun 
Example Sentences
Recent Examples on the Web Activists say that anything that helps prosecute pederasts would be a welcome tool. 
Julia Scheeres, WIRED, 4 June 2002 Think of convicted pederast Jerry Sandusky, whose Second Mile foundation—cited as one of President Bush's 1,000 points of light in a 1990 letter of commendation—put him continually in the presence of young boys. Kevin Conley, Town & Country, 30 Mar. 2016
Julia Scheeres, WIRED, 4 June 2002 Think of convicted pederast Jerry Sandusky, whose Second Mile foundation—cited as one of President Bush's 1,000 points of light in a 1990 letter of commendation—put him continually in the presence of young boys. Kevin Conley, Town & Country, 30 Mar. 2016 Word History
Etymology
Greek paiderastēs, literally, lover of boys, from paid- ped- + erastēs lover, from erasthai to love — more at eros
First Known Use
1638, in the meaning defined above
Medical Definition
pederast
noun
ped·er·ast ˈped-ə-ˌrast
variants or chiefly British paederast
ˈpēd-
: one that practices pederasty
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