• Webster's Revised Unabridged Dictionary
    • n Knighthead (Naut) A bollard timber. See under Bollard.
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Century Dictionary and Cyclopedia
    • n knighthead Nautical, a bollardtimber; one of two pieces of timber rising just within the stem, one on each side of the bow sprit, to secure its inner end; also, one of two strong frames of timber which inclose and support the ends of the windlass.
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In literature:

Spray flew about her forward; as the swell got steeper she dipped to the knightheads, and Miguel, running aft, began to use the lead.
"The Coast of Adventure" by Harold Bindloss