noun
exact science
Refers to a field of science that relies on precise measurement and quantitative methods, such as physics or chemistry.
物理学は厳正科学の代表例だ。
Physics is a prime example of an exact science.
Compound of 厳正 (strict, rigorous) and 科学 (science). The exact historical derivation is uncertain, but the term is used to describe sciences with precise quantitative methods.