lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions; used as a medicine or food for humans and livestock; a source of glycerol
a volcanic island in the North Atlantic near the Arctic Circle
an island republic on the island of Iceland; became independent of Denmark in 1944
any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks