8 letters · 15 points in Scrabble
noun plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative
originFrom Latin psyllium, from Ancient Greek ψύλλιον (psúllion, “fleawort”), from ψύλλα (psúlla, “flea”) + -ιον (-ion, forming neuter diminutives).
Etymology from Wiktionary, CC BY-SA 3.0