centerfold (n.)youdaoicibaDictYouDict[centerfold 词源字典]
also center-fold, "fold-out center spread of a magazine or newspaper," 1950, from center (n.) + fold (n.2). "Playboy" debuted December 1953, and the word came to be used especially for illustrations of comely women, hence "woman who poses as a centerfold model" (by 1965).[centerfold etymology, centerfold origin, 英语词源]