The term 'SPRAY IN A CAN' can be summarized as an AEROSOL, which is a type of container that holds a substance under pressure and releases it as a fine spray when a valve is pressed. An AEROSOL is typically composed of a propellant, such as a gas or compressed air, and a liquid or solid material, such as paint or insecticide. Aerosols are commonly used in the home and workplace for cleaning, lubricating, and other purposes.