" high-energy "

[Adjective]  | "high-en*er*gy" | \ ˈhī-ˈe-nər-jē \

1: having such speed and kinetic energy as to exhibit relativistic departure from classical laws of motion —used especially of elementary particles whose velocity has been imparted by an accelerator

2: of or relating to high-energy particles

3: yielding a relatively large amount of energy when undergoing hydrolysis

Origin: 1934 ;

[Noun]  | "high-energy physics" 

1: particle physics

Origin: 1964 ;

[Noun]  | "particle physics" 

1: a branch of physics dealing with the constitution, properties, and interactions of elementary particles especially as revealed in experiments using particle accelerators —called also high-energy physics

Origin: 1946 ;