01 n. A piece of timber in a ship laid on the middle of the floor timbers over the keel, and binding the floor timbers to the keel; in iron vesse…
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1.
A piece of timber in a ship laid on the middle of the floor timbers over the keel, and binding the floor timbers to the keel; in iron vessels, a structure of plates, situated like the keelson of a timber ship.(Shipbuilding)
Phrases & compounds
Cross keelson —
a similar structure lying athwart the main keelson, to support the engines and boilers.