Crank may refer to:
Science
- Crank conjecture, a term coined by Freeman Dyson to explain congruence patterns in integer partitions
- Crank (person), someone who holds pseudoscientific theories no matter what evidence is presented to the contrary.
Mechanism
- Crank (mechanism), in mechanical engineering, a bent portion of an axle, or shaft, or an arm keyed at right angles to the end of a shaft, by which motion is imparted to or received from it
- Crankshaft, the part of a piston engine which translates reciprocating linear piston motion into rotation
- Crankset, the component of a bicycle drivetrain that converts the reciprocating motion of the rider's legs into rotational motion used to drive the chain, which in turn drives the rear wheel
People
Places
Popular culture
Slang
- Crank, a disparaging term for a person who holds unorthodox opinions
- Crank calls, a term for false telephone calls made to strangers
- Crank, slang term for powered amphetamines, especially methamphetamine
Other
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