What is "chrysolaminarin"

n. (context carbohydrate English) A storage polysaccharide typically found in photosynthetic heterokonts.

Chrysolaminarin is a linear polymer of β(1→3) and β(1→6) linked glucose units in a ratio of 11:1. It used to be known as leucosin. Chrysolaminarin is alongside cellulose arguably one of the most common biopolymers in the world.