Definify.com

Webster 1913 Edition

Noun.

[From

Cetraria

Islandica, the scientific name of Iceland moss.]

(Chem.)

A white substance extracted from the lichen, Iceland moss (

Cetraria Islandica

). It consists of several ingredients, among which is cetraric acid, a white, crystalline, bitter substance.

cetrarin ‎(uncountable)

(organic chemistry) A white substance extracted from Iceland moss, one of whose ingredients is cetraric acid.