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spectre d'absorption
astr.	dark-line spectrum
chem.	absorbtion spectrum
nat.sc.	absorption spectra
tech.	absorption spectrum
spectre d’absorption
anal.chem.	excitation spectrum; absorption spectrum (of a luminescent compound)
chem.	absorption spectrum

spectre d’ absorption: 4 phrases in 4 subjects

Chemistry	1
Health care	1
Life sciences	1
Metallurgy	1