Definition: The dried plant, Cetraria islandica (family Parmeliaceae), a lichen, not a moss, used as a demulcent and as a folk remedy for bronchitis.
Synonym(s): Iceland moss
[L. caetra, a short Spanish shield (from shape of the apothecia)]
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.