ピレンMeanings1nounpyreneA polycyclic aromatic hydrocarbon (PAH) used in research and industry; the term is a direct loan from English.ピレンは多た環かん芳ほう香こう族ぞく炭たん化か水すい素その一いっ種しゅです。Pyrene is a type of polycyclic aromatic hydrocarbon.