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

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

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