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

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

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