1º_ Relative to the ecology . From the Greek 959; 953; 954; 959; 962; ( oikos "home") 955; 959; 947; 953; 945; ( lodge "knowledge , study") _ 953; 954; 959; 962; ( _ikos "relative to" ) . 2º_ In some countries it is an official qualification with legal value for agricultural products that use sustainable methods throughout their production and distribution chain. See also greenwashing.