Irish moss noun \ˌī(ə)r-ish-ˈmȯs\
: the dried and bleached plants of a red alga (especially Chondrus crispus) that are used as an agent for thickening or emulsifying or as a demulcent (as in cookery or pharmacy)—called also chondrus
: a red alga (especially Chondrus crispus) that is a source of Irish moss—called also carrageen
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