English edit

 
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Etymology edit

crank +‎ case

Noun edit

crankcase (plural crankcases)

  1. The part of an engine that contains the crankshaft.
    • 1960 January, “The Swindon Type "4" diesel-hydraulic units”, in Trains Illustrated, page 41:
      The crankcase itself is in one piece, in the form of a tunnel into which the crankshaft is introduced from one end.

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