Lichen
Pronunciation: /ˈlaɪkən/ · Category: botany
Definition: A composite organism formed by a fungus living in partnership with algae or cyanobacteria, which make food through photosynthesis.
More about lichen
Lichens grow on rocks, bark and soil, including in very cold and dry places. Although they are often studied alongside plants, lichens are not plants: they are a partnership between a fungus and a photosynthetic partner.