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daggerboard

[dag-er-bawrd, -bohrd]
noun Nautical.
  1. a removable board on a small sailboat, typically of small dimension fore and aft, lowered into the water through a trunk to serve as a keel.
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Compare centerboard.

Origin of daggerboard

dagger + board
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for daggerboard

daggerboard

noun
  1. a light bladelike board inserted into the water through a slot in the keel of a boat to reduce keeling and leewayCompare centreboard
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012