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Webster 1913 Edition

Noun.

(Naut.)

A projecting piece of timber or iron near the bow of vessel, to which the anchor is hoisted and secured.

cathead ‎(plural catheads)

(nautical) A heavy piece of timber projecting from each side of the bow of a ship for holding anchors which were fitted with a stock in position for letting go or for securing after weighing.
Similar rigging on the outside of a building.

nautical: heavy piece of timber for holding an anchor in position