: any of various colloidal substances (such as an alginate or alginic acid) derived from marine brown algae and used especially as emulsifiers or thickeners
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The hydrating gel mask is infused with seawater algin to smooth fine lines and undereye puffiness, yeast extract to detox and hydrate, and strawberry seed extract to strengthen the skin’s protective barrier.—
Celia Shatzman,
Forbes,
29 May 2021 At the time, local companies would cut the tops off kelp canopies and extracted algin, a chemical that was used for everything from controlling the foam in beer and making desserts moister.—
Gary Robbins,
sandiegouniontribune.com,
1 Sep. 2017
: a substance obtained from marine brown algae that is used especially in food and paints to give thickness or firmness or to make a stable liquid mixture in which drops of one liquid are scattered evenly throughout the other
: 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