Shell: meaning, definitions and examples

This word can also refer to the outer case or structure of inanimate objects, such as buildings, structures, or electronic devices.

• The building was just a shell after the fire.
• He removed the shell of his old phone.

Specifically refers to the hard upper shell of turtles, crustaceans, and arachnids. It is used in biological contexts.

• The turtle's carapace was beautifully patterned.
• A crab's carapace can be quite tough.

Used in biological or scientific contexts to refer to the rigid external covering that supports and protects the bodies of arthropods (insects, spiders, crustaceans).

• The insect's exoskeleton is made of chitin.
• Arthropods rely on their exoskeleton for protection.

This term is used in zoological contexts, often referring to the external shell of echinoderms (like sea urchins). It is a specialized and less commonly used term.

• The scientist studied the sea urchin's test.
• A test typically covers the delicate internal organs of sea urchins.

Use 'shell' when referring to the outer casing of a projectile fired from larger firearms like cannons, artillery, or tanks.

• The soldiers loaded the cannon with a high-explosive shell
• The battlefield was littered with spent shells after the long firefight

Use 'cartridge' when talking about the complete package of a bullet with its casing, primer, and propellant. It can be used for both small arms and other firearms.

• He loaded fresh cartridges into his rifle before heading out
• The hunter always carried extra cartridges in case he ran out

Use 'bullet casing' when referring to the metal case that is left behind after a bullet has been fired from a gun. It's more specific to small arms and handguns.

• The detective found several bullet casings at the scene, which could be crucial evidence
• The sound of bullet casings hitting the ground echoed through the alley

Use 'ammunition' when discussing the general term for bullets, shells, grenades, or any other type of weaponry used in firing or explosives.

• The troops were running low on ammunition and needed resupply
• Different types of ammunition are suitable for different weapons

This term is often used for the hard outer covering of nuts, some fruits, eggs, and sea creatures such as shellfish.

• She cracked the walnut shell to get to the nut inside
• The diver admired the beauty of the seashell

Mainly used for the outer skin of fruits and vegetables, which is usually softer and can be removed by hand or with a peeler.

• She peeled the apple for her salad
• The recipe instructs to peel and dice the potatoes

This is typically used to describe the dry outer covering of some fruits or seeds, like corn, which needs to be removed before consumption.

• He removed the husk from the corn before boiling it
• The rice grains are separated from their husks during processing

Refers to the thin outer layer of fruits, vegetables, and animals. It can be removed or eaten, depending on the food.

• Banana skin turns brown when it ripens
• The chef instructed to remove the chicken skin before cooking