WordReference Random House Unabridged Dictionary of American English © 2026
big′ end′, [Mach.]
  1. Mechanical Engineeringthe end of a connecting rod or piston rod that is attached to a crankpin.
  • 1905–10

Collins Concise English Dictionary © HarperCollins Publishers::
big end n Brit
  1. the larger end of a connecting rod in an internal-combustion engine
'big end' also found in these entries (note: many are not synonyms or translations):
connecting rod

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