ISB Nomenclature ISB Glossary Search for glossary terms (regular expression allowed) Begin withContainsExact termSounds like GlossariesISB Nomenclature All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Main definition Venn Diagram An illustration of the inclusion relation of elements of a set. Used to indicate common genes or unique genes between genomes.