"Smoke grenades" are devices that produce a thick cloud of smoke when activated, often used by military forces to create a smokescreen or conceal oneself. Full definition
According to news reports, officers reacted with smoke grenades... (relevantmagazine.com)
A new type of smoke grenade that can obscure sensors in the visible and infrared ranges burns during a test. (sciencedaily.com)
Players are given an arsenal of weapons from pistols, rifles, and rocket launchers, as well as smoke grenades, claymore mines, and cardboard boxes to hide in. (gamerassaultweekly.com)