Nail-headed

a.
  1. Having a head like that of a nail; formed so as to resemble the head of a nail.
    2. Nail-headed characters ,
    arrowheaded or cuneiform characters. See under Arrowheaded.
    Nail-headed molding (Arch.),
    an ornament consisting of a series of low four-sided pyramids resembling the heads of large nails; -- called also nail-head molding, or nail-head. It is the same as the simplest form of dogtooth. See Dogtooth.