Definitions for "Secondary pollutant"
See BT pollutant. secondhand smoke: See SN sidestream smoke. secretion: 1. Process by which a substance such as a hormone or enzyme produced in a cell is passed through a plasma membrane to the outside, for example the intestinal lumen or the blood (internal secretion). 2. Solid, liquid or gaseous material passed from the inside of a cell through a plasma membrane to the outside as a result of cell activity.
contaminant formed from other pollutants in the atmosphere.
Harmful chemical formed in the atmosphere when a primary air pollutant reacts with normal air components or other air pollutants. Compare primary pollutant.