The Collaborative International Dictionary
Physico-
Physico- \Phys"i*co-\ [Fr. Gr. ? natural, physical.] A combining form, denoting relation to, or dependence upon, natural causes, or the science of physics.
Douglas Harper's Etymology Dictionary
physico-
word-forming element meaning "physical, physically; natural," from Latinized comb. form of Greek physikos "natural, physical" (see physic).
Wiktionary
physico-
pre. 1 physical; pertaining to physics 2 natural; having or relating to or depending upon natural causes