helmet shell
noun
a predatory marine gastropod of the family Cassidae, characterized by a thick, heavy shell with a broadened outer lip.
the shell of this animal, often used for making cameos.
Origin of helmet shell
First recorded in 1745–55
Words nearby helmet shell
helm port,
helmand,
helmer,
helmet,
helmet liner,
helmet shell,
helmeted guinea fowl,
helmholtz,
helmholtz function,
helminth,
helminthagogue