coat'

A membrane, forming, or a isting in forming, the wall or investment of an organ, adventitial c. See adventitia. areolar c. A c. of areolar ti ue, e. g., the submucous c. of the alimentary canal or the fibrous investment of the liver. buffy c. The upper layer of the clot that forms in blood from an individual affected with acute inflammation. Its buff color is owing to the absence of red corpuscles, they having sunk to the lower portions before coagulation began. A more or le marked buffy c. often forms in any blood that coagulates tardily, dermic c. of a hair follicle. The outer layer, which consists itself of three layers. The most external of them is of longitudinal fibers of connective ti ue without elastic fibers; it is continuous above with the corium of the skin. The internal layer is transparent and homogeneous, corresponding to a membrana propria. The middle layer is made up of fibrous matrix composed of transverse connective ti ue corpuscles with oblong nuclei. It is continuous with the papillary part of the cutis vera, external c. See adven* titi a. external elastic c. Syn.: external elastic tunic. The innermost layer of COCA IN the adventitia, found in most of the larger and medium-sized arteries, internal c. See intima. internal elastic c. Syn.: internal elastic tunic, elastic longitudinal' fiber-layer. The outermost layer of the internal c. of arteries, mucous c. A c. consisting of mucous membrane, muscular c. A c. consisting of or containing, muscular fibers, peritoneal c. A c. consisting of peritoneum, serous c. A c. consisting of serous membrane, submucous c. A c. situated beneath a mucous c. uveal c. See uvea, vaginal c. Of the eyeball, its fibrous capsule. Of the testicle; see tunica vaginal is testis, under tunica. [Old Fr., cote.']