FREEWHEELS
Noun
freewheels
plural of freewheel
Source: Wiktionary
FREEWHEEL
Free"wheel`, n. (Mach.)
Definition: A clutch fitted in the rear hub of a cycle, which engages the
rear sprocket with the rear wheel when the pedals are rotated
forwards, but permits the rear wheel to run on free from the rear
sprocket when the pedals are stopped or rotated backwards.
Freewheelcycles are usually fitted with hub brakes or rim brakes,
operated by back pedaling.
Free"wheel`, v. i.
1.
(a) Of a freewheel cycle, to run on while the pedals are held still.
(b) Of a person, to ride a cycle of this manner. To ride a freewheel
cycle.
2. (Mach.) To operate like a freewheel, so that one part moves
freely over another which normally moves with it; -- said of a
clutch.
Source: Webster’s Unabridged Dictionary 1913 Edition