What Is The Origin Of "Sleep Tight"?
Definition of physico-mechanical in English:
physico-mechanical
adjective
Of or relating to the dynamics of physical forces, or the branch of science concerned with mechanical phenomena.
Origin
Mid 17th century; earliest use found in Robert Sharrock (bap. 1630, d. 1684), Church of England clergyman and natural historian. From physico- + mechanical.
