: 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
Examples of psyllium in a Sentence
Recent Examples on the Web
Our bodies didn’t develop to digest psyllium husk and inulin.
—
Catherine Ho, San Francisco Chronicle, 8 Mar. 2026
Soluble fiber—found in oats, barley, beans, lentils, chia seeds, flaxseed, apples, and psyllium—has the strongest LDL-lowering effect.
—Stephanie Anderson Witmer, Health, 23 Feb. 2026
That said, psyllium does contain a little bit of insoluble fiber too.
—Carolyn L. Todd, SELF, 23 Feb. 2026
Combining inulin and psyllium provides broader support for gut health.
—Amber J. Tresca, Verywell Health, 19 Feb. 2026
See All Example Sentences for psyllium
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Catherine Ho, San Francisco Chronicle, 8 Mar. 2026
Soluble fiber—found in oats, barley, beans, lentils, chia seeds, flaxseed, apples, and psyllium—has the strongest LDL-lowering effect.
—Stephanie Anderson Witmer, Health, 23 Feb. 2026
That said, psyllium does contain a little bit of insoluble fiber too.
—Carolyn L. Todd, SELF, 23 Feb. 2026
Combining inulin and psyllium provides broader support for gut health.
—Amber J. Tresca, Verywell Health, 19 Feb. 2026
See All Example Sentences for psyllium
Cite this Entry
“Psyllium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psyllium. Accessed 3 Apr. 2026.
Copy CitationMedical Definition
psyllium
noun
psyl·li·um
ˈsil-ē-əm 
1
: fleawort
2
: psyllium seed
also
: the husks of psyllium seed
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