shells
nounUK /ʃelz/
US /ʃɛlz/
Shells are the hard outer covers that protect some animals, like snails and turtles.
We collected pretty shells on the beach.
OTHER MEANINGS
2. The hard outer covering of an egg, nut, or seed.
She cracked the egg shells into the bowl.
3. A metal container fired from a large gun.
The old cannon fired empty shells during the show.
4. A program that lets you type commands to a computer.
He opened the shell to run a command.