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

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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

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Wrist pin is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a chattering or flighty, light-headed person.
Example sentences
The connecting rod contains a machining defect in the wrist pin bushing of the rod that could cause a seizure of the piston pin.
The piston is connected to the crank by a connecting rod and wrist pin.
The piston broke at the wrist pin hole and seized in the cylinder.
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