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An acute infectious, usually self-limited, disease believed to represent activation of latent varicella-zoster virus (HERPESVIRUS 3, HUMAN) in those who have been rendered partially immune after a previous attack of chickenpox. It involves the sensory ganglia and their areas of innervation and is characterized by severe neuralgic pain along the distribution of the affected nerve and crops of clustered vesicles over the area. (From Dorland, 27th ed)

1. A zone; any encircling or belt-like structure. 2. Herpes zoster.

A girdle; herpes zoster.

A zone, band, or area.

A girdle or belt.

Herpes zoster.

See zone. z. arcuata. The middle section of the membrana basilaris. z. choriacea. The thickened margin of the membrana basilaris where it rests on the lamina spiralis ossea. z. denticulata. The z. choriacea and the z. interna of the basilar membrane, z.externa. That portion of the membrana basilaris that is external to the outer rods of Corti. z. fasciculata. The main portion of the cortex of the suprarenal capsule. It lies beneath the z.glomerulosa, and is composed of elongated and columnlike anastomosing groups of cells, z. ganglionaris. A large ganglion layer in Rosenthal's canal, lying on the periphery of the modiolus, between the fibrous bundles of the latter and the spiral lamina, z. glomerulosa. The layer of the suprarenal capsule next the fibrous capsule, forming the proper substance of the body of the organ and Consisting of oval or rounded masses of cells that are really the ends of cells of the z. fasciculata. z. herpetica. See herpes periscelis, under herpes, z. ignea. See zoster, z. incerta. A layer of fine longitudinal nerve fibers, with a few scattered ganglion cells, immediately adjoining the reticular formation, z. interna, z. levis. The portion of the membrana basilaris that is internal to the outer rods of Corti. z. orbicularis. A thickening of the capsular ligament of the hip joint corresponding to the margin of the acetabulum, z. pectinata. The external, finely striated section of the lamina spiralis membranacea. z. pellucida. The vitelline membrane, so-called on account of its appearing as a broad transparent band lying between the opaque yolk substance within and the granular cells of the discus proligerus which adhere to it externally. When moderately magnified it appears homogeneous, but under a high power it exhibits a striated appearance as if it were porous, z. perforata. The inner division of the lamina spiralis membranacea, Which is perforated in numerous places for the passage of the fibers of the cochlear nerve, z. radiata. The subepithelial coat of the ovarian ovum, made up of a layer of columnar cells, belonging to the discus Proligerus. z. reticularis. The deepest layer of the cortex of the suprarenal capsule. Here the columns of cells disappear, only round Groups remaining in between the septal connective tissue. [Gr., zone, belt, Girdle.]