フコイダンMeanings1nounfucoidanchemistryA sulfated polysaccharide found in brown algae; used in chemistry and health contexts.フコイダンは褐かっ藻そう類るいに含ふくまれる多た糖とう類るいの一いっ種しゅです。Fucoidan is a type of polysaccharide found in brown algae.