from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A spectral line having more than one component, representing slight variations in the energy states characteristic of an atom.
- n. Any of several classes or groupings of subatomic particles, such as the nucleon, that are similar in most properties but different in electric charge.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A spectral line that has multiple components
- n. A compound peak produced in several forms of spectroscopy
- n. Any of several groupings of subatomic particles that share most properties, but have different charges
multipl(e) + (doubl)et.(American Heritage® Dictionary of the English Language, Fourth Edition)