noun Date: 14th century a flat thin ring or a perforated plate used in joints or assemblies to ensure tightness, prevent leakage, or relieve friction, one that washes
WASHER
Meaning of WASHER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012