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1
English
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1.1
Noun
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jack block
1 language
Malagasy
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From Wiktionary, the free dictionary
English
[
edit
]
Noun
[
edit
]
jack
block
(
plural
jack blocks
)
(
nautical
)
A block fixed in the
topgallant
or royal rigging, used for raising and lowering light masts and spars.
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en:Nautical
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jack block
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