(surgery) The removal of (all or part of) the parasympathetic nervous system

(mathematics) A two-dimensional vector field of the phase between two variables

(astronomy) A spiral galaxy in the Local Group and closest to the Milky Way, visible to the naked eye in the constellation of Andromeda, the brightest of the Messier objects and often referred to b...

A census-designated place in Amador County, California, United States.