a harmful type of smog formed when pollutants like vehicle exhaust or industrial gases react with ultraviolet light from the sun

as if falling into thick smoke or mist; used metaphorically to describe being completely at a loss, unable to grasp the essentials, or losing one's bearings, or being utterly confused

aerosol; fine spray of particles or liquid droplets

a bomb or grenade that produces smoke, used in military or firefighting operations

rare, progressive cerebrovascular disorder caused by blocked arteries at the base of the brain in the basal ganglia