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jackknives

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jackknife

One entry found.

Main Entry: ¹jack·knife

Pronunciation: \ˈjak-ˌnīf\

Function: noun

Date: 1711

1 : a large strong pocketknife
2 : a dive executed headfirst in which the diver bends from the waist and touches the ankles while holding the knees unbent and then straightens out

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