What does fleawort mean?
Fleawort is the common name for certain plantain species, chiefly Plantago psyllium and Plantago indica, cultivated for their minute, mucilage-rich seeds. The name reflects an older belief that the plant could ward off fleas, but its lasting importance lies in medicine: the seed coats absorb water and form a gel, making them an effective gentle laxative and a popular source of soluble dietary fibre. In contemporary pharmacies the seeds are sold under the names psyllium or ispaghula, so 'fleawort' now appears mostly in botany, gardening, and herbal-medicine writing rather than everyday speech. As a word, it belongs to the old English tradition of compound plant names built on 'wort', meaning herb, alongside relatives such as liverwort and mugwort. Knowing it links the language of medieval herbals with a modern wellness staple.
nounA plant of the genus Plantago (especially Plantago psyllium or Plantago indica), whose small seeds, known as psyllium, are used medicinally as a laxative and dietary fibre supplement.
- Any of several plantain plants of the genus Plantago whose mucilaginous seeds are used as a laxative and source of dietary fibre.
- Historically, a plant believed to repel or cure fleas, whence its name.
"The herbalist recommended a spoonful of fleawort seed stirred into water each morning."
"Ground fleawort husks swell into a gel that soothes the digestive tract."
"In medieval herbals, fleawort was listed among the plants strewn on floors to drive away insects."
Standard plural, used mainly when referring to multiple plants of the group.
"Several fleaworts thrive in the dry, sandy soils of the Mediterranean."
The plant got its unglamorous name because its tiny seeds were once mistaken for — or used against — fleas, yet those same seeds are today's best-known natural source of soluble fibre.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does fleawort come from?
Fleawort is formed from the Old English 'flēa' (flea) plus 'wyrt' (plant, herb), a compound recorded in early Germanic plant lore; the 'wort' element simply means herb and survives in many traditional plant names. The association with fleas came either from the resemblance of the tiny seeds to flea eggs or from the plant's reputed use in repelling the insects. Its modern medicinal identity was consolidated when the seeds entered international commerce as psyllium, a name borrowed via Latin from Greek 'psyllion'. Related 'wort' compounds such as liverwort, mugwort, and ragwort share the same naming tradition.
How fleawort is actually used
Fleawort is a somewhat old-fashioned botanical name; in modern health contexts the word 'psyllium' has largely replaced it, though it remains current in herbal medicine and gardening literature.
Easily confused with fleawort
Psyllium is the commercial name for the seed or husk harvested from fleawort plants, whereas fleawort refers to the plant itself.
Common plantain (Plantago major) is a widespread lawn weed in the same genus, while fleawort specifically denotes species grown for their medicinal seeds.