bestiary (n.)youdaoicibaDictYouDict[bestiary 词源字典]
"medieval treatise on beasts" usually with moralistic overtones, 1818, from Medieval Latin bestiarium "a menagerie," also "a book about animals", from bestia (see beast). A Latin term for such works was liber de bestiis compositus. Roman bestiarius meant "a fighter against beasts in the public entertainments."[bestiary etymology, bestiary origin, 英语词源]