Dictionary.net

A crooked timber in the builtup rib or frame of a wooden vessel.

n. One of the middle timbers between the floor and the upper timbers. Futtock plates are small iron plates on the caps of the fore, main, or mizzen masts, fastened on the upper part to the dead-eyes, and with round holes or eyes in the lower part through which the futtock shrouds are reeved. Futtock shrouds are small shrouds leading from the upper ends of the fore, main, or mizzen shrouds to the caps of the mast, and there joining the topmast shrouds respectively.