Definition of algin
: any of various colloidal substances (such as an alginate or alginic acid) derived from marine brown algae and used especially as emulsifiers or thickeners
Medical Definition of algin
: any of various colloidal substances derived from marine brown algae and especially giant kelp: asa: alginic acidb: 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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