Definify.com
Webster 1913 Edition
Nail-headed
Nail′-headˊed
,Adj.
 Having a head like that of a nail; formed so as to resemble the head of a nail. 
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
.