Yahoo Web Search

Search results

  1. Dictionary
    A·tom·ic the·o·ry
    /əˈtɑmɪk ˈθɪəri/

    noun

    • 1. the theory that all matter is made up of tiny indivisible particles (atoms). According to the modern version, the atoms of each element are effectively identical, but differ from those of other elements, and unite to form compounds in fixed proportions.

    Powered by Oxford Languages