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1. the mature ovule of a flowering plant.
3. a small cylindrical shell of gold or other suitable material, used in application of radiation therapy.
4. to inoculate a culture medium with microorganisms.
plantago seed (plantain seed) (psyllium seed) cleaned, dried ripe seed of species of Plantago; used as a bulk-forming laxative.
radon seed a small sealed container for radon, for insertion into the tissues of the body in radiotherapy.
psyl·li·um seed(sil'ē-ŭm sēd),
The cleaned, dried ripe seed of Plantago indica, P. isphagula, or of P. ovata. A mild cathartic that acts by absorbing water and providing indigestible mucilaginous bulk for the intestines. Must not be used in intestinal obstruction.
The cleaned, dried, ripe seed of Plantago psyllium or P. indica. It is used as a cathartic, but usually in a powdered form rather than in the form of whole seeds.