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Webster 1913 Edition
Boottopping
Boot′topˊping
,Noun.
1.
(Naut.)
The act or process of daubing a vessel’s bottom near the surface of the water with a mixture of tallow, sulphur, and resin, as a temporary protection against worms, after the slime, shells, etc., have been scraped off.
2.
(Naut.)
Sheathing a vessel with planking over felt.