PSYLLIUM
fleawort, psyllium, Spanish psyllium, Plantago psyllium
(noun) plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative
Source: WordNet® 3.1
Etymology
Noun
psyllium (usually uncountable, plural psylliums)
Any of several plants of the subgenus Plantago subg. Psyllium, whose seeds are used commercially for the production of mucilage and their laxative properties.
Synonyms: fleawort, ispaghula
synonym of psyllium (seed) husk, especially as a dietary supplement
Source: Wiktionary