doubling

[ duhb-ling ]
/ ˈdʌb lɪŋ /

noun Nautical.

the part of the upper or lower end of one spar of a mast that is overlapped by another spar above or below it.

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Origin of doubling

Middle English word dating back to 1350–1400; see origin at double, -ing1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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