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

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

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