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

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

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