lobster-tailed pot

noun1

1. •
   A European combat helmet, worn especially from the 1600s into the 1700s, consisting of a rounded skull-piece, often cheek guards and a nasal or face-guard, and a laminated defence (or single plate ridged to imitate lames) to protect the back of the neck that resembled a lobster's tail.

   • The close helmet shown in the illustration was by this time giving place to the pot, the familiar lobster-tailed pot with side-pieces or cheeks and a barred, open face protection. — 2002