daggerboard

American  

[dag-er-bawrd, -bohrd] / ˈdæg ərˌbɔrd, -ˌboʊrd /

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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daggerboard British  

/ ˈdæɡəˌbɔːd /

noun

1. a light bladelike board inserted into the water through a slot in the keel of a boat to reduce keeling and leeway Compare centreboard

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Etymology

Origin of daggerboard

dagger + board

Example Sentences

When the boats are foiling, they’re riding only on the leeward daggerboard and both rudders.

From Washington Times

We tipped the boat again, and I swam around to grab the daggerboard.

From Seattle Times

A single daggerboard—which slides vertically through the keel to reduce sideways movement—costs hundreds of thousands of pounds.

From The Wall Street Journal

The Italian team dropped out of that race because of a damaged daggerboard.

From Reuters

Artemis Racing sailed with a new daggerboard in the port hull.

From New York Times