jack-up

noun
\ˈjak-ˌəp \

Definition of jack-up 

: a drilling rig used in offshore drilling whose drilling platform is a barge from which legs are lowered to the bottom when over the drill site and which is raised above the water and supported on the legs to conduct drilling operations

First Known Use of jack-up

1961, in the meaning defined above

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The first known use of jack-up was in 1961

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