ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English flewort, from Old English flēawyrt, from flēah, flēa flea + wyrt herb, root — more at flea , wort
1. : an Old World plantain ( Plantago psyllium ) having seeds that swell and become gelatinous when moist and that are used as a mild laxative — called also psyllium
2. : any of various plants supposedly efficacious as destroyers of fleas