hyperbola (n.)youdaoicibaDictYouDict[hyperbola 词源字典]
1660s, from Latinized form of Greek hyperbole "extravagance," literally "a throwing beyond" (see hyperbole). Perhaps so called because the inclination of the plane to the base of the cone exceeds that of the side of the cone.[hyperbola etymology, hyperbola origin, 英语词源]