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spectral ['spektrəl] adj.
light.	espectral
metrol.	densidade espectral de …

spectral: 227 phrases in 26 subjects

Antennas and waveguides	7
Chemistry	1
Communications	24
Earth sciences	33
Electronics	66
Environment	4
General	1
Health care	1
Immigration and citizenship	2
International Monetary Fund	1
Labor law	2
Life sciences	2
Lighting other than cinema	32
Mathematics	10
Medical	1
Metrology	4
Natural sciences	7
Nuclear physics	1
Physical sciences	2
Piezoelectric crystals	1
Radio	2
Radiology	1
Statistics	10
Technology	1
Transport	6
Vacuum tubes	5