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Measurement of a plank or timber from inboard to outboard, i.e., parallel to the plane in which the member lies; opposed to siding measured at right angles to such plane. Thus, the molding of a frame is measured in the thwartship direction while that of a stern piece is its cross sectional dimension fore and aft. May also be spelled: Moulding.

A term common to wooden boat design and construction.

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