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jack plane
jack rafter
Jack Robinson
Jack Russell
jack-tar
Jack-the-lad
Jack-the-rags
jack up
jack-up
jackal
jackanapes
jackass
jackboot
jackdaw
jacked
jacket
jacket potato
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jack-up
jack-up (plural jack-ups) or jack-up rig (plural jack-up rigs)


noun 
Definition:
 
oil rig with retractable legs: an offshore oil rig with a floating hull and retractable legs that can be lowered to the seabed for support
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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