raie ultime

== English == === Alternative forms === Raie Ultime === Etymology === First attested in the plural in February 1910 and in the singular in 1920; French: raie (“line”) + ultime (“final”). === Pronunciation === IPA(key): /ˌɹeɪ ulˈtim/ === Noun === raie ultime (plural raies ultimes) (spectroscopy) The line in an atomic spectrum that results from a transition to the lowest level of excitation from the first higher non-metastable level.