[phys.ics] n pl but sing or pl in constr [L physica, pl., natural science, fr. Gk physika, fr. neut. pl. of physikos of nature, fr. physis growth, nature, fr. phyein to bring forth--more at be] (1715) 1: a science that deals with matter and energy and their interactions
2. a: the physical processes and phenomena of a particular system b: the physical properties and composition of something