/ ˈfɪzɪks; NAmE / noun
[ U ] the scientific study of forces such as heat, light, sound, etc., of relationships between them, and how they affect objects :
a degree in physics
particle / nuclear / theoretical physics
the laws of physics
a school physics department
to study the physics of the electron
—see also astrophysics , geophysics
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WORD ORIGIN
late 15th cent. (denoting natural science in general, especially the Aristotelian system): plural of obsolete physic physical (thing) , suggested by Latin physica , Greek phusika natural things from phusis nature.