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Kingpin

/ˈkɪŋ.pɪn/

(motorized vehicles) The axis around which steered wheels pivot; a bolt that holds the axis in place—a kingbolt.

📖 Definitions of "Kingpin"

noun

1
(motorized vehicles) The axis around which steered wheels pivot; a bolt that holds the axis in place—a kingbolt.
2
The pin at the centre of the triangle of bowling pins (originally the tallest pin in kayles). Sometimes also the headpin at the apex.
3
The most important person in an undertaking or organization.
4
The bolt holding together the truck of a roller skate or skateboard.

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