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

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