Capsule

(kap'-sul). A tunic or bag that encloses a part of the body or an organ. In biology, the investment of a part or organ, as a dehiscent pod or seed-ve el, the egg-case of an insect, the test of a radiolarian. Also, in pharmacy, a small, spheroidal shell composed of glycerin and gel at'n, divided so that the parts fit together like a box and cover. It is used for the administration of nauseous and repulsive medicines. C, Bonnet's, the posterior portion of the sheath of the eyeball. C, Bowman's. See Bowman's Capsule . C, External, a layer of white nerve-fibers forming part of the external boundary of the lenticular nucleus. C. -filler, a contrivance consisting of a funnel, tube and plunger, or other device, used for introducing medicines into capsules. C. of Gli on, the cellulo-vascular membrane enveloping the hepatic ve els. C, Internal, a layer of nerve-fibers beneath and on the inner side of the optic thalamus and caudate nucleus, which it separates from the lenticular nucleus, and containing the continuation upward of the crus cerebri. C. of the Lens, a transparent, structurele membrane enclosing the lens of the eye. C, Malpighian, the commencement of the uriniferous tubules. See Malpighian Bodies. C, Suprarenal, the ductle glandular body at the apex of each kidney. C. of Tenon, the tunica vaginal is of the eye.