windmill
noun
[ ˈwɪn(d)mɪl ]
• a building with sails or vanes that turn in the wind and generate power to grind corn into flour.
windmill
verb
• (with reference to a person's arms) move or be moved round in a circle in a manner suggestive of the rotating sails or vanes of a windmill.
• "Penny slipped, windmilled her arms, and somehow kept her balance"
