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Jack-the-lad
Jack-the-rags
jack up
jack-up
jackal
jackanapes
jackass
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jackscrew
jack·screw [ ják skr ] (plural jack·screws)


noun 
Definition:
 
mechanical engineering 
Same as  screw jack
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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