About Normal Pressure Hydrocephalus. Normal pressure hydrocephalus occurs when excess cerebrospinal fluid accumulates in the brain's ventricles, which are hollow fluid-filled chambers. NPH is called normal pressure because despite the excess fluid, cerebrospinal fluid pressure as measured during a spinal tap is often normal.
â¢ ART DECO (noun). The noun ART DECO has 1 sense: 1. a style of design that was popular in the 1920s and 1930s; marked by stylized forms and geometric designs adapted to mass production. Familiarity information: ART DECO used as a noun is very rare. ART DECO (noun). The noun ART DECO has 1 sense: 1. a style of design that was popular in the 1920s and 1930s; marked by stylized forms and geometric designs adapted to mass production. Familiarity information: ART DECO used as a noun is very rare.
Freebase(0.00 / 0 votes)Rate this definition: SIS is an acronym that stands for Software Installation Script. It is an archive for Symbian OS, and not an application file, as sometimes believed; the real Symbian application is the .APP or .EXE file within it. By convention .sisx denotes a signed file. There are different ways how a SIS file can be created.