The Collaborative International Dictionary of English v.0.48:

Headmold shot \Head"mold` shot"\, Headmould shot \Head"mould`
shot"\ (-m[=o]ld` sh[o^]t`). (Med.)
   An old name for the condition of the skull, in which the
   bones ride, or are shot, over each other at the sutures.
   --Dunglison.
   [1913 Webster]