helmet shell

  1. a predatory marine gastropod of the family Cassidae, characterized by a thick, heavy shell with a broadened outer lip.

  2. the shell of this animal, often used for making cameos.

Origin of helmet shell

First recorded in 1745–55

Words Nearby helmet shell

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023