knighthead

noun Nautical.

1. either of a pair of upright members flanking and securing the bowsprit of a ship at the bow, often used as mooring bitts; apostle.
2. a plate at the fore end of a topgallant forecastle, on an iron or steel sailing ship, through which a spike bowsprit passes.

noun

1. nautical either of a pair of vertical supports for each side of the bowsprit