Definition of glasswort:
(n) :
Any plant of the salt-tolerant genus Salicornia (syn. Sarcocornia), once burned to produce the ash used to make soda glass.
(n) :
Other salt-tolerant plants, especially those used to produce such ash.
(n) :
Other salt-tolerant plants, called samphire.
(n) :
Species of the Australian genus Tecticornia
(n) :
Arthrocnemum subterminale (Parish's glasswort)
(n) :
Eriogonum salicornioides (glasswort buckwheat)