Simple categories matching spectral:

• information,
• band,
• analysis,
• component,
• property,
• feature,
• region,
• distortion,
• structure,
• attribute,
• quantity,
• change,
• variation,
• characteristic,
• color,
• measure,
• behavior,
• range,
• shape,
• channel,
• sonority,
• line,
• energy,
• composition,
• artefact,
• parameter,
• transformation,

Members with property spectral:

• color,
• spectral_index,
• meson_mass,
• intensity_parameter,
• reflection,
• line_narrowing,
• hadron_mass,
• partial_coherence,
• sensitivity,
• density,
• yellow,
• fluctuation,
• absorbance,
• luminescence,
• vowel,
• phase,
• power,
• coherence,
• large_peak,
• sand,
• spectral_transition,
• partial_power,
• absorption,
• wavelength_shift,
• power_spectrum,
• gain_coherence,
• absorption_maximum,
• power-law_continuum,
• pitch_estimate,
• bioscience,
• blue,
• lf,
• alpha,
• quasiparticle_energy,
• character,
• local_density,
• baseline_shape,
• granger_causality,
• contrast,
• loss,
• energy_spectrum,
• spectral_yellow,
• spectral_resolution,
• spectral_purity,
• average,
• mode,
• pitch_cue,
• satellite_imagery,
• absorbance_maximum,
• recombination_line,
• peak_value,
• symmetry,
• compression,
• fluorescence_excitation,
• onset,
• peak_amplitude,
• chemical_shift,
• histology,
• difference_tone,
• power_values,
• intensity_variation,
• intensity,
• mobility,
• transmittance_shift,
• green,
• solar_band,
• expansion,
• absorption_spectrum,
• harmonic_structure,
• spectral_radiance,
• amplitude,
• peak_energy,
• energy,
• coherency,
• infrared_band,
• speaker_harmonics,
• presence,
• red,
• central_wavelength,
• values,
• ultraviolet_region,
• fluorescence_intensity,
• peak,
• emission_spectrum,
• uv_range,
• drum,
• resolution,
• spectroscopic_characteristic,
• spectrum_envelope,
• chinese_character,
• modulus_values,
• high_frequency,
• optical_power,
• peak_broadening,
• luminosity_class,
• peak_position,
• detail,
• temperature,
• quantum_yield,
• absorption_peak,
• logarithmic_shift,
• absorption_feature,
• luminance_channel,
• broadening,
• peak_frequency,
• riser,
• pitch,
• spacing_distribution,
• combination,
• shoulder,
• carbon-dioxide_band,
• auto_power,
• separability,
• band_shift,
• ability,
• shape,
• spectral_shape,
• multiple_coherence,
• coupling_constant,
• kinematics,
• shot_noise,
• green_band,
• peak_phase,
• position,
• peak_heights,
• emission_enhancement,
• spectral_power,
• binding_specificity,
• absorbance_analysis,
• ir,
• period,
• frequency_shift,
• noise_level,
• center_frequency,
• peak_shift,
• line_shape,
• water,
• face,
• width,
• harmonics,
• intensity_loss,
• skewness,
• brightness,
• spectrum,
• aniline,
• line_width,
• residual_carrier,
• visible_light,
• shift,
• range,
• intensity_increase,
• power-law_shape,
• ultraviolet_band,
• reflection_feature,
• wavelength_stability,
• hf,
• excitation_spectrum,
• comb_filter,
• light,
• ph_shift,
• colors,
• infrared_range,
• cd,
• peak_brightness,
• lipid,
• escape_peak,
• broadband_colours,