psyllium

English Thesaurus

1. plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative (noun.plant)

hypernym	:	plantain,
definition	:	any of numerous plants of the genus Plantago; mostly small roadside or dooryard weeds with elliptic leaves and small spikes of very small flowers; seeds of some used medicinally (noun.plant)