The Collaborative International Dictionary of English v.0.48:

Brunonian \Bru*no"ni*an\, a.
   Pertaining to, or invented by, Brown; -- a term applied to a
   system of medicine promulgated in the 18th century by John
   Brown, of Scotland, the fundamental doctrine of which was,
   that life is a state of excitation produced by the normal
   action of external agents upon the body, and that disease
   consists in excess or deficiency of excitation.
   [1913 Webster]