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1. Chiefly Brit a small hand axe
2. a butcher's cleaver
3. an informal name for a helicopter
4. Physics a device for periodically interrupting an electric current or beam of radiation to produce a pulsed current or beam
5. a type of bicycle or motorcycle with very high handlebars and an elongated saddle
6. NZ a child's bicycle
Any knife, axe, or mechanical device for chopping or cutting an object into segments.
A device for interrupting an electric current, beam of light, or beam of infrared radiation at regular intervals, to permit amplification of the associated electrical quantity or signal by an alternating-current amplifier; also used to interrupt a continuous stream of neutrons to measure velocity.
A colloquial term for helicopter.