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The line in an atomic spectrum that results from a transition to the lowest level of excitation from the first higher non-metastable level.
Definition source: English Wiktionary via Wiktextract
Qualifier: spectroscopy
No example sentence was provided for this meaning.
Meaning relationships
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Antonyms: none provided
Alternative letter-case form of raie ultime.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
First attested in the plural in February 1910 and in the singular in 1920; French: raie (“line”) + ultime (“final”).