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Definition of irish moss

irish moss

Plural:Irish mosses
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irish moss Lexical Profile

• noun

1

The dried and bleached form of this coastal seaweed, traditionally used as a thickening and clarifying agent in cooking, brewing, and cosmetics.

Example

"Homebrewers sometimes add a small amount of Irish moss to the boiling wort to help clarify the beer before fermentation."


2

A species of red algae native to the rocky Atlantic coasts of Europe and North America, widely harvested for its carrageenan content.

Example

"The coastal foragers carefully harvested Irish moss from the tidal rocks during the low spring tide."


3

A creeping, moss-like evergreen perennial plant often used as a ground cover in landscaping, though it is biologically a member of the pink family rather than a true moss.

Example

"We planted Irish moss between the stepping stones in the garden to create a lush, green carpet that tolerates light foot traffic."

Synonyms
View all synonyms for irish moss

Word Nuance & Usage

The term 'Irish moss' frequently causes botanical confusion, as it can refer either to a coastal red algae used to produce carrageenan or to a terrestrial landscaping plant that is completely unrelated to actual moss.

Word Origin & Etymology

The name originally stems from its historical abundance and traditional harvesting along the rocky Atlantic coasts of Ireland, where the seaweed was historically gathered for food and medicinal uses.

Cite this Entry


Wordmom. (2026). Definition of Irish moss. In Wordmom Dictionary. Retrieved Oct 12, 2026, from https://wordmom.com/dictionary/irish moss
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