Hypospray

A hypospray is a fictional version of a jet injector. Sometimes it is used as a verb, "to hypospray", meaning "to use a hypospray on". The concept of the hypospray was developed when producers on the original Star Trek series discovered that NBC's broadcast standards and practices prohibited the use of hypodermic syringes to inject medications; the needleless hypospray sidestepped this issue. The prop used in the original series appeared to be a modified fuel injector for a large automotive diesel engine, similar to the engines which jet injectors were derived from.