The green pigment found in photosynthetic organisms, like plants and algae, that enables them to absorb light energy to use for growth and reproduction
US Department of Commerce, National Oceanic and Atmospheric Administration, Glossary - NOAA's State of the Coast (SOTC), Washington, DC, USA 2013. http://stateofthecoast.noaa.gov/glossary.html, (CoaStormEmr - Amer) {881}