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

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

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