What is "arctic moss"

n. an erect grayish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans [syn: reindeer moss, reindeer lichen, Cladonia rangiferina]

Arctic moss is a common name for several plants and may refer to: Apig

• Calliergon giganteum, an aquatic moss
• Cladonia, a genus of lichens