The term "Division Lichenes" refers to a group of organisms commonly known as lichens. Lichens are complex organisms that consist of a symbiotic relationship between a fungus and an alga or cyanobacterium. The division Lichenes is characterized by the unique appearance and texture of lichens, which often resemble moss or a crusty growth on rocks or trees. Synonyms for the term "Division Lichenes" include lichenology, lichenography, and lichenobiology. These terms are used to describe the study of lichens, their classification, and their role in ecosystems. Lichens are important indicators of environmental health and are used in scientific research, medicine, and industry.