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A brittle, grayish-brown lichen (Cetraria islandica) of Arctic and alpine regions, sometimes used as a food or in medicine.
(Plants) a lichen, Cetraria islandica, of arctic regions and N Europe, with brownish edible fronds
an edible lichen, Cetraria islandica, of arctic regions.
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|Noun||1.||Iceland moss - 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|
lichen - any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.