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Webster 1828 Edition

Noun.

the point of an arrow.

forkhead ‎(plural forkheads)

(obsolete) An arrow with a barbed tip.
- 1590, Edmund Spenser, The Faerie Queene, III.5:
  With that at him a quiv'ring dart he threw, / With so fell force, and villeinous despite, / That through his haberjeon the forkehead flew, / And through the linked mayles empierced quite [...].
(biochemistry) A sequence of amino acids that forms a motif, in FOX proteins, that binds to DNA