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fifth wheel
 
Noun fifth wheel has 3 senses
  1. fifth wheel, deadwood - someone or something that is unwanted and unneeded
    --1 is a kind of redundancy, redundance
  2. fifth wheel, spare - an extra car wheel and tire for a four-wheel vehicle
    --2 is a kind of car wheel
  3. fifth wheel - a steering bearing that enables the front axle of a horse-drawn wagon to rotate
    --3 is a kind of     bearing
fifth amendment fifth avenue fifth column fifth columnist fifth cranial nerve fifth crusade fifth grade felony fifth part fifth wheel fifthly fifths fifthy fifties fiftieth fifty-cent piece fifty-eight fifty-fifth

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