iceland moss(n = noun.plant) cetraria islandica, iceland lichen - 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;
is a kind of lichen
is a member of cetraria, genus cetraria

   A kind of lichen (Cetraria Icelandica) found from the Arctic regions to the North Temperate zone. It furnishes a nutritious jelly and other forms of food, and is used in pulmonary complaints as a demulcent. [1913 Webster]

acrocarpous moss, arctic moss, beard moss, black moss, bog moss, capital of iceland, club moss, iceland, iceland lichen, iceland poppy, iceland spar, irish moss, little club moss, long moss, moss, moss agate, moss animal, moss campion, moss family, moss genus, moss green, moss hart, moss locust, moss phlox, moss pink, peat moss, pleurocarpous moss, reindeer moss, republic of iceland, rose moss, scale moss, sea moss, spanish moss, sphagnum moss, spike moss, staghorn moss