柳雷鸟 liǔléiniǎo willow ptarmigan Origin Definitions Defs Strokes Stroke Words Sentences Sents 柳 liǔ noun willow (bound form) willow tree; any of various trees of the genus Salix雷鸟 雷鳥 léiniǎo ptarmigan ptarmigan; any of several species of grouse in the genus Lagopus that live in cold high-altitude or arctic regions and change feather color with the seasons