Definition of psyllium
: the seed of a fleawort (especially Plantago psyllium) that has the property of swelling and becoming gelatinous when moist and is used as a mild laxative —called also psyllium seed
Origin of psyllium
New Latin psyllium, from Greek psyllion fleawort, from psylla
First Known Use: 1598
Learn More about psyllium
Medical Dictionary: Definition of "psyllium"
Seen and Heard
What made you want to look up psyllium? Please tell us where you read or heard it (including the quote, if possible).