n.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
同义词：Iceland lichenCetraria islandica
英汉双解大词典
Iceland moss
1.
N（名词）
a lichen, Cetraria islandica, of arctic regions and N Europe, with brownish edible fronds 冰岛海苔