noun

le obus

shell

C'est un projectile métallique rempli d'explosif, tiré par un canon ou une arme lourde, qui explose à l'impact ou après un certain temps.

The word "obus" in French means "shell" or "artillery shell." It specifically refers to the projectile fired from large guns or cannons, often in military contexts.

Explanation:

An obus is a type of ammunition designed to be fired from artillery pieces, such as cannons or howitzers.
It usually contains explosive material and is intended to explode on impact or after a certain time.

Synonyms and differences:

Obus: Specifically an artillery shell, generally explosive and designed for use in heavy weapons.
Balle: Means "bullet," which is fired from small arms like rifles or pistols, typically smaller than an obus.
Projectile: More general term for any object thrown or fired, including obuses, bullets, or missiles.
Grenade: A small explosive device, usually thrown by hand or launched from special devices; different from an artillery shell in size and use.

In short, "obus" implies a large, heavy artillery shell used in warfare, distinguished from smaller ammunition like bullets or grenades.