Poppet /(?)/

Pop·pet

Poppet

n.
  1. See Puppet.
  2. One of certain upright timbers on the bilge ways, used to support a vessel in launching. (Naut.)
  3. An upright support or guide fastened at the bottom only. (Mach.)
  4. same as poppit.

Phrases & Compounds
Poppet head
See Headstock (a).