trunnions

/T R AH1 N Y AH0 N Z/

noun

1
One of the short stubby bearings on either side of a cannon; a gudgeon.
2
A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool.
3
A similar rotational bearing used in automotive suspensions.

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