algin
noun
al·gin ˈal-jən 
: any of various colloidal substances (such as an alginate or alginic acid) derived from marine brown algae and used especially as emulsifiers or thickeners
Example Sentences
Recent Examples on the Web 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
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 Word History
Etymology
alga + -in entry 1
First Known Use
1883, in the meaning defined above
Medical Definition
algin
noun
al·gin ˈal-jən
: 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