Meaning of PHYSICS in English
■ plural noun [treated as sing. ] the branch of science concerned with the nature and properties of matter and energy.
↘the physical properties and phenomena of something.
C15 (denoting natural science in general): plural of obs. physic 'physical (thing)', suggested by L. physica (see physic ).
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004