n.
Pronunciation: ' si-l ē - ə m
Function: noun
Etymology: New Latin psyllium, from Greek psyllion fleawort, from psylla
Date: 1598
: the seed of a fleawort (esp. Plantago psyllium ) that has the property of swelling and becoming gelatinous when moist and is used as a mild laxative ― called also psyllium seed