mid 16th cent.: from Latin genialisnuptial, productive, from genius(see genius). The Latin sense was adopted into English; hence the senses mild and conducive to growth (mid 17th cent.), later cheerful, kindly (mid 18th cent.)mid 19th cent.: from Greek geneionchin (from genusjaw) + -al
英英释义网络释义
noun
1.diffusing warmth and friendliness;
an affable smile
2.of or relating to the chin or median part of the lower jaw