noun
: a shaft coupling having a ratchet and pawl or a similar device whereby the driven member may be turned in one direction only by the driving member and may also overrun the driving member
noun
: a shaft coupling having a ratchet and pawl or a similar device whereby the driven member may be turned in one direction only by the driving member and may also overrun the driving member
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012