Aerosol
<B>1.</B> In general, a fine mist or spray which contains minute particles.<BR><B>2.</B> In medicine, a spray administered by a nebulizer and inhaled for treatment.<BR><B>3.</B> In medicine, a mist that causes disease as, for example, the hantavirus pulmonary syndrome.<BR><B>4.</B> In the environment, particles emitted into the air naturally as in volcanic eruptions and through human action such as burning fossil fuel.<BR><B>5.</B> In the environment, the pressurized gas used to propel substances out of a container