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Webster 1913 Edition

Noun.

[Cf. F.

chassis

a framework of carpentry.]

(Naut.)

A piece of oak bolted perpendicularly on the side of a vessel, to aid in drawing down and securing the clew of the mainsail.

chesstree ‎(plural chesstrees)

(nautical) Either of two pieces of oak fitted to the topsides of a square-rigged vessel on each side of the bow through which the bowlines were fed; often decoratively carved