raie ultime
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See also: Raie Ultime
English[edit]
Alternative forms[edit]
Etymology[edit]
First attested in the plural in February 1910 and in the singular in 1920; French: raie (“line”) + ultime (“final”).
Pronunciation[edit]
Noun[edit]
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.
- 1920, Optical Methods in Control and Research Laboratories, page 4:
- De Gramont distinguished by the name of Raie Ultime that line in the spectrum of an element which is the last to disappear.