Plasma grenade

A plasma grenade is an explosive device.

In 2366, the Bajoran Resistance detonated a plasma grenade on the Promenade, injuring Skrain Dukat in an assassination attempt. Odo arrested Ishan Chaye, Jillur Gueta and Timor Landi for the crime and they were executed by the Cardassians. It was later discovered the three were innocent and could not have been the ones who threw the plasma grenade. 

In 2375, Dukat had several plasma grenades in the armory in his private quarters in the Letau prison facility.