bow.headn.(名词)A whalebone whale(Balaena mysticetus) of Arctic seas, having a very large head and an arched upper jaw. 北极露脊鲸,弓头鲸:生活在北冰洋的一种有鲸须的鲸鱼(北极露脊鲸 露脊鲸属), 具有大的头部和拱形的上颚