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jack block
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noun Nautical.
a block used in raising or lowering a topgallant yard.
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QUIZ YOURSELF ON "IS" VS. "ARE"
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IS and ARE are both forms of which verb?
Origin of jack block
First recorded in 1785–95
Words nearby jack block
jackass penguin, jackass rig, jackatar, jack bean, “Jack, Be Nimble”, jack block, jackboot, jackbooted, jack-by-the-hedge, jack chain, jack crevalle
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022