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  1. Oxford American Dictionary

    natural science

    • IPA[ˌnaCHər(ə)l ˈsīəns]

    美式

    • n.
      a branch of science that deals with the physical world, e.g. physics, chemistry, geology, biology.；the branch of knowledge that deals with the study of the physical world.

    • noun: natural science, plural noun: natural sciences