Medical Dictionary


noun al·gin \ˈal-jən\

Medical Definition of ALGIN

:  any of various colloidal substances derived from marine brown algae and especially giant kelp: as a :  alginic acid b :  a soluble salt of alginic acid used especially as a stabilizing, emulsifying, or thickening agent in foods (as ice cream), pharmaceuticals, and cosmetics and as a base for dental-impression materials—called also sodium alginate


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