What does carrageen mean?
Carrageen is a technical and culinary name for a red seaweed, especially the North Atlantic species Chondrus crispus, known in English as Irish moss. The dried alga has long been used as a thickener and as a source of carrageenan, the sulfated polysaccharide extracted from red seaweeds and used to give foods such as dairy alternatives, desserts, and processed meat a stable gel or smooth texture. Carrageen can refer to the seaweed itself; carrageenan, by contrast, specifically names the extracted substance, so the two terms should not be treated as exact synonyms. The word is uncommon in general conversation but familiar in food science, nutrition, and botanical contexts, where it may appear on ingredient labels or in discussions of vegetarian products. Its name comes from Irish carraighín, a diminutive related to carraig, “rock.” Also spelled carragheen, carrageen is best known for turning a coastal plant into a useful food additive.
nounCarrageen is an edible red seaweed, especially Chondrus crispus, or the dried material made from it. It is the source of carrageenan, a polysaccharide used as a thickener and gelling agent.
- An edible red seaweed, especially Chondrus crispus, found in the cold waters of the North Atlantic and used in food.
- The dried seaweed or a preparation made from it, used as a thickener and as the source of carrageenan.
"The recipe called for dried carrageen, which gave the soup a smooth, slightly firm texture."
"The recipe called for dried carrageen, which gave the soup a smooth, slightly firm texture."
"The guide identified the carrageen washed up along the tidal pools."
The plural is uncommon because carrageen is normally treated as a mass noun when referring to dried seaweed or a preparation; it is used mainly when individual plants or pieces are being counted.
"Several fresh carrageens were displayed beside the dried samples."
Called “Irish moss,” carrageen is not a moss at all—it is a red alga used to make the gels that give plant milks and desserts their familiar texture.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does carrageen come from?
The word was borrowed from Irish carraighín, a diminutive of carraig, meaning “rock.” It developed in English as the name of the red seaweed used in food and as the source of carrageenan. The related spelling carragheen subsequently became an established English variant.
How carrageen is actually used
The word is primarily used in botanical, culinary, and food-science contexts. Carragheen is an established alternative spelling, and carrageen is usually treated as a mass noun when referring to the dried material.
Easily confused with carrageen
Carrageen is the red seaweed from which carrageenan is extracted; carrageenan is the extracted polysaccharide used as a thickener or gelling agent.