spectral

adj (fml 文) 1 of or like a spectre(1) （似）鬼的, 幽灵的: spectral figures 鬼影. 2 of the spectrum or spectra 谱的; 光谱的: spectral colours 谱色.

specific gravity, specifically, specification, specificity, specify, specimen, specious, speciously, speciousness, speck, speckle, speckled, specs, spectacle, spectacled, spectacles, spectacular, spectacularly, spectator, spectator sports, spectre (US specter), spectro-, spectrometer, spectroscope, spectroscopic, spectrum, speculate, speculate on, speculation, speculation about, speculative, speculator, sped, speech, speech therapist, speech therapy, speech-day, speechify, speechless, speechlessly,