[usu. with modifier]a person or device that washes something 洗涤者;洗涤器 a glass washer. 玻璃清洗器。 ■a washing machine 洗衣机 ■a windscreen washer 汽车挡风玻璃刮水器 ■(Austral.)a facecloth (澳)洗脸毛巾
a small flat ring made of metal, rubber, or plastic fixed under a nut or the head of a bolt to spread the pressure when tightened or between two joining surfaces as a spacer or seal 垫圈