Spectral, Spectral color, Spectral sequence, Spectral music, Spectral density, Spectral theorem, Spectral efficiency, Adams spectral sequence, Spectral line, Spectral mask, Frölicher spectral sequence, Spectral method, Hodge–de Rham spectral sequence, Spectral gap, Serre spectral sequence, Spectral band, Grothendieck spectral sequence, Spectral density estimation, Spectral theory, Spectral radius, Arnold's spectral sequence, Spectral imaging, Applied Spectral Imaging, Spectral modeling synthesis, Multidimensional spectral estimation, Lyndon–Hochschild–Serre spectral sequence, Spectral index, Spectral bat, Spectral (disambiguation), Spectral interferometry, Spectral printing, Spectral analysis, Joint spectral radius, Spectral space, Spectral Souls: Resurrection of the Ethereal Empires, Spectral tarsier, Eilenberg–Moore spectral sequence, Full spectral imaging, Spectral centroid, Spectral power distribution, Spectral decomposition

Källén–Lehmann spectral representation, Spectral network, Maximum entropy spectral estimation, Spectral Sciences Incorporated, Spectral energy distribution, Spectral dimension, Spectral Force 3, Peptide spectral library, Atiyah–Hirzebruch spectral sequence, Least-squares spectral analysis, Spectral band replication, Spectral flux density, Spectral Associates, Spectral gap (physics), Spectral induced polarisation, Regularization by spectral filtering, Cosmic microwave background spectral distortions, Noise spectral density, Spectral element method, CDMA spectral efficiency, Spectral resolution, Gursky's spectral tarsier, Free spectral range, Asteroid spectral types, Line spectral pairs, Čech-to-derived functor spectral sequence, Spectral line shape, Spectral slope, Spectral signature, Spectral Evidence (1997 book), Spectral Display, Radiant flux, Spectral sensitivity, Onwards to the Spectral Defile, Orthogonal polarization spectral imaging, Spectral Worship, Spectral noise logging, Stellar classification, Spectral atlas, Spectral rendering, Spectral width, Spectral abscissa, Polynomial matrix spectral factorization, Radiometry, Spectral phase interferometry for direct electric-field reconstruction, Spectral asymmetry, Radiant intensity, Spectral acceleration, Spectral clustering, Spectral Lines

Spectral, Spectral color, Spectral sequence, Spectral music, Spectral density, Spectral theorem, Spectral efficiency, Adams spectral sequence, Spectral line, Spectral mask, Frölicher spectral sequence, Spectral method, Hodge–de Rham spectral sequence, Spectral gap, Serre spectral sequence, Spectral band, Grothendieck spectral sequence, Spectral density estimation, Spectral theory, Spectral radius, Arnold's spectral sequence, Spectral imaging, Applied Spectral Imaging, Spectral modeling synthesis, Multidimensional spectral estimation, Lyndon–Hochschild–Serre spectral sequence, Spectral index, Spectral bat, Spectral (disambiguation), Spectral interferometry, Spectral printing, Spectral analysis, Joint spectral radius, Spectral space, Spectral Souls: Resurrection of the Ethereal Empires, Spectral tarsier, Eilenberg–Moore spectral sequence, Full spectral imaging, Spectral centroid, Spectral power distribution, Spectral decomposition, Källén–Lehmann spectral representation, Spectral network, Maximum entropy spectral estimation, Spectral Sciences Incorporated, Spectral energy distribution, Spectral dimension, Spectral Force 3, Peptide spectral library, Atiyah–Hirzebruch spectral sequence, Least-squares spectral analysis, Spectral band replication, Spectral flux density, Spectral Associates, Spectral gap (physics), Spectral induced polarisation, Regularization by spectral filtering, Cosmic microwave background spectral distortions, Noise spectral density, Spectral element method, CDMA spectral efficiency, Spectral resolution, Gursky's spectral tarsier, Free spectral range, Asteroid spectral types, Line spectral pairs, Čech-to-derived functor spectral sequence, Spectral line shape, Spectral slope, Spectral signature, Spectral Evidence (1997 book), Spectral Display, Radiant flux, Spectral sensitivity, Onwards to the Spectral Defile, Orthogonal polarization spectral imaging, Spectral Worship, Spectral noise logging, Stellar classification, Spectral atlas, Spectral rendering, Spectral width, Spectral abscissa, Polynomial matrix spectral factorization, Radiometry, Spectral phase interferometry for direct electric-field reconstruction, Spectral asymmetry, Radiant intensity, Spectral acceleration, Spectral clustering, Spectral Lines, Radiant exitance, Spectral flatness, Radiant exposure, Hydrogen spectral series, Spectral Genomics, The Spectral Sorrows, Spectral splatter, Reflectance, Spectral submanifold, Leray spectral sequence, Spectral Hash, Spectral leakage, Irradiance, Spectral Dusk, Radiance, Chromatic spectral sequence, Spectral Evidence, Spectral geometry, Frequency principle/spectral bias, May spectral sequence, Spectral Mornings, Spectral shape analysis, Spectral (Skyfire album), Spectral triple, Spectral purity, Spectral glide, Spectral graph theory, Spectral concentration problem, Spectral pygmy chameleon, Pseudo-spectral method, Spectral Evidence (poetry collection), Multispectral imaging, EHP spectral sequence, Alexis Spectral Data, Spectral layout, Spectral evidence, Spectral variability hypothesis, Spectral (Dave Rempis album), Spectral set, Spectral flux, Spectral correlation density, Spectral risk measure, Log-spectral distance, Spectral Database for Organic Compounds, Spectral imaging (radiography), Bockstein spectral sequence, Quillen spectral sequence, Freudenthal spectral theorem, Colorimetry, Spectral invariants, Multi-spectral camouflage, Spectral regrowth, Spatiospectral scanning, Spectral expansion solution, Radiosity (radiometry), Projection-valued measure, Spectral line ratios, Hilbert spectral analysis, Spectral test, Phasor approach to fluorescence lifetime and spectral imaging