A hand grenade is a small hand-held anti-personnel weapon designed to be thrown and then explode after a short time. The word "grenade" is derived from the French grenade, meaning pomegranate, so named because its shrapnel pellets reminded soldiers of the seeds of this fruit. Grenadiers were originally soldiers who specialized in throwing grenades.
Not all grenades are thrown by hand. Several types are fired from rifles or purpose-designed grenade launchers. For example, tear gas grenades used in riot control are fired from riot guns, and the M203 grenade launcher can be fitted to several types of assault rifles.