I have a lot of time to contemplate at work, since much of my time is spent monitoring my coater machine. Lately I contemplated why the pump that brought the solution to the coater was called ‘peristaltic’. Here’s what i found.
Peristalsis |ˌperəˈstôlsis, -ˈstal-| (Noun–Physiology)
The involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wavelike movements that push the contents of the canal forward. Or in my case, the rotating of the inner parts of the pump, which constricts and relaxes the hose and forces the solution up into the coater.
ORIGIN mid 19th cent.: modern Latin, from Greek peristallein ‘wrap around,’ from peri- ‘around’ + stallein ‘to place.’