GNU Collaborative International Dictionary of English

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1.       
   Glasswort , n. (Bot.) A seashore plant of the Spinach family (Salicornia herbacea), with succulent jointed stems; also, a prickly plant of the same family (Salsola Kali), both formerly burned for the sake of the ashes, which yield soda for making glass and soap.
   1913 Webster