Multiplet
[muhl-tuh-plet, -plit] /ˈmʌl təˌplɛt, -plɪt/
noun, Physics.
1.
a group of several related spectral lines, usually of nearly the same wavelengths.
/ˈmʌltɪˌplɛt; -plɪt/
noun (physics)
1.
a set of closely spaced lines in a spectrum, resulting from small differences between the energy levels of atoms or molecules
2.
a group of related elementary particles that differ only in electric charge
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