helmet shell


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.

Nearby words

  1. helm port,
  2. helmand,
  3. helmer,
  4. helmet,
  5. helmet liner,
  6. helmeted guinea fowl,
  7. helmholtz,
  8. helmholtz function,
  9. helmholtz, hermann ludwig ferdinand von,
  10. helminth

Origin of helmet shell

First recorded in 1745–55

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019