Multiplet Definition
 mŭltə-plĕt, -plĭt 
    noun
  
 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.
 Webster's New World 
A line in a spectrum composed of a group of related lines.
 Webster's New World 
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.
 American Heritage 
(chemistry) A compound peak produced in several forms of spectroscopy.
Wiktionary 
Other Word Forms of Multiplet
Noun
Singular:
 multipletPlural:
 multipletsOrigin of Multiplet
multipl(e) (doubl)et
From American Heritage Dictionary of the English Language, 5th Edition
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