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rockshaft

[ rok-shaft, -shahft ]

noun

, Machinery.
  1. an oscillating shaft.

rockshaft

/ ˈrɒkˌʃɑːft /

noun

  1. a shaft that rotates backwards and forwards rather than continuously, esp one used in the valve gear of a steam engine

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Word History and Origins

Origin of rockshaft1

First recorded in 1870–75; rock 2 + shaft

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rock saltrock-shelter

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