Definition of multiplet in English:

multiplet

noun

Physics
  • A group of closely associated things, especially closely spaced spectral lines or atomic energy levels, or subatomic particles differing only in a single property (e.g. charge or strangeness).

    • ‘Saturation was thereby achieved by multiple photon absorption in thymine doublets and multiplets.’

Origin

1920s: from multiple, on the pattern of words such as doublet and triplet.

Pronunciation:

multiplet

/ˈmʌltɪplɪt/