vane
noun/veɪn/
/veɪn/
- a flat blade that is moved by wind or water and is part of the machines in a windmill, etc.
（风车等的）叶片，翼，轮叶 - The windmill’s sails are wooden vanes whose angle can be adjusted from inside the mill.
风车的帆是木制叶片，其角度可以从风车内部调节。
Word Originlate Middle English: dialect variant of obsolete fane ‘banner’, of Germanic origin. - The windmill’s sails are wooden vanes whose angle can be adjusted from inside the mill.