- a set of quantum mechanical states that are related to each other and whose single energy level can be split into a specific number of distinct energy levels
- a line in a spectrum composed of a group of related lines
Origin of multipletmultipl(e) + -et
- A spectral line having more than one component, representing slight variations in the energy states characteristic of an atom.
- Any group of subatomic particles that are similar in most properties, but have different electric charges, such as the nucleons, which form a doublet, or the pions, which form a triplet.
Origin of multipletmultipl(e) (doubl)et