wrist pin

wrist pin

noun Machinery.
a pin joining the end of a connecting rod to a trunk piston or the end of a piston rod.

Origin:
1870–75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Wrist pin is always a great word to know.
So is lollapalooza. Does it mean:
a fool or simpleton; ninny.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Collins
World English Dictionary
wrist pin
 
n
1.  a cylindrical boss or pin attached to the side of a wheel parallel with the axis, esp one forming a bearing for a crank
2.  (US), (Canadian) Also called (esp in Britain): gudgeon pin the pin through the skirt of a piston in an internal-combustion engine, to which the little end of the connecting rod is attached

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