Pinion


              Pinion [PIN-yuh'n]
                [noun, transitive verb ]
                MEANING :
            1. (n.) a cogwheel or gear with teeth, used with or connecting with a rack or larger gear
2. (n.) the wing of a bird or its flight feathers
3. (n.) the terminal segment of a bird's wing
4. (tr. v.) to bind or cut off the terminal segment of the bird's wing
5. (tr. v.) to restrain by binding or to shackle
              
  USAGE EXAMPLE 1:
 The mechanic got the old grinding mill to start working by replacing the pinion and ring gear and overhauling the entire machinery.

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