singlet

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singlet

1. Physics a multiplet that has only one member
2. Chem a chemical bond consisting of one electron

singlet

[′siŋ·glət]
(quantum mechanics)
An energy level that is not split by a relatively weak interaction, and thus is not a multiplet or a member of a multiplet.
(spectroscopy)
A spectral line that cannot be resolved into components at even the highest resolution.