glasswort

noun

1. any of several plants of the genus Salicornia, of the amaranth family, having succulent stems with rudimentary leaves, formerly used, when burned to ashes, as a source of soda for glassmaking.

noun

1. Also called: marsh samphire any plant of the chenopodiaceous genus Salicornia, of salt marshes, having fleshy stems and scalelike leaves: formerly used as a source of soda for glass-making
2. another name for saltwort (def. 1)