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.
A decoy or informer, especially a police spy. For example, Watch out for Doug; I'm sure he's a stool pigeon for the supervisor. This term alludes to a bird tied to a stool or similar perch in order to attract other birds, which will then be shot. However, one writer believes that stool is a variant for stale or stall, both nouns used for a decoy bird before 1500 or so. [ c. 1820 ]