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spectral adj.
metrol.	spectral density of ...; spectral concentration of ...
tech.	spectral

spectral: 406 phrases in 37 subjects

Acoustics	1
American usage, not spelling	1
Analytical chemistry	3
Antennas and waveguides	4
Astronomy	29
Automatic control	1
Chemistry	7
Communications	43
Construction	2
Cultural studies	1
Earth sciences	45
Electronics	71
Environment	3
General	7
Health care	8
High energy physics	2
Hobbies and pastimes	1
Immigration and citizenship	1
Information technology	1
Labor law	4
Life sciences	2
Lighting other than cinema	10
Mathematics	9
Medical	6
Medical appliances	19
Metallurgy	2
Natural resourses and wildlife conservation	4
Natural sciences	15
Nuclear physics	19
Physical sciences	3
Remote sensing	3
Statistics	3
Technology	42
Transport	5
United Nations	1
Дозиметрия	12
Радиоактивное излучение	16