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Webster 1913 Edition

(bĭl′lĕt-hĕd)

Noun.

(Naut.)

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.

billethead ‎(plural billetheads)

(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.