This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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• Wordscraper
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n. A substance that forms a gel with water.

n. Any material that forms a colloid (especially a gel) when mixed with water

n. Such a material, made from agar, used to make dental impressions

n. a substance that forms a gel with water

"The Brown Seaweeds produce a different kind of hydrocolloid, algin, which is a polymer of guluronic and mannuronic acids."

substance   

Jell-O   

biomimetic    polyacrylamide    siliconic    bioneural    deleteany    agarose    semisolid    doesn    semiliquid    intial