billet +‎ head


billethead ‎(plural billetheads)

  1. (nautical) A round piece of timber at the bow or stern of a whaleboat, around which the harpoon line is run out when the whale darts off.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.