Term: sulfur dioxide: a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: lesser celandine: perennial herb native to Europe but naturalized elsewhere having heart-shaped leaves and yellow flowers resembling buttercups; its tuberous roots have been used as a poultice to relieve piles
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: chaparral pea: spiny evergreen xerophytic shrub having showy rose and purple flowers and forming dense thickets; of dry rocky mountain slopes of California
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: belaying pin: a wood or metal bar to which a rope can be secured (as on a ship or in mountain climbing)
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: hospital bed: a single bed with a frame in three sections so the head or middle or foot can be raised as required
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: time being: the present occasion
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: mercury-vapor lamp: ultraviolet lamp that emits a strong bluish light (rich in ultraviolet radiation) as electric current passes through mercury vapor
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: chirrup: a series of chirps
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: beaked hazelnut: hazel of western United States with conspicuous beaklike involucres on the nuts
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: pet: a fit of petulance or sulkiness (especially at what is felt to be a slight)
Broader: pollutant: waste matter that contaminates the water or air or soil | Unrelated: genus anomalops: type genus of the family Anomalopidae