psyl·li·um ![](/application/resources/images/mini-speaker.png) (s ĭl ē- əm)
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n.1. Any of several annual Eurasian plants of the genus Plantago, especially P. ovata or P. afra, having opposite leaves and small flowers borne in dense spikes. 2. The seed husks of any of these plants, widely used as a mild bulk laxative and sometimes added to foods as a dietary source of soluble fiber.
[New Latin, from Greek psullion, from Greek psulla, flea (from the flealike appearance of the seeds ).] ![](/application/resources/arts/THpsyllium.jpg) (click for a larger image) psylliumpsyllium seeds |