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Webster 1913 Edition

(sûr′märkˊ)

Noun.

(Shipbuilding)

A mark made on the molds of a ship, when building, to show where the angles of the timbers are to be placed.

[Written also

sirmark

surmark ‎(plural surmarks)

(shipbuilding) A mark made on the moulds of a ship to show where the angles of the timbers are to be placed.