1718, "capable of seeing spectres;" 1815, "ghostly;" from spectre + -al (1). Meaning "pertaining to a spectrum" is 1832, from stem of spectrum + -al (1). Related: Spectrally.
例文
1. She is compelling, spectral ,fascinating,an unforgettably unique performer.
彼女はとても魅力的で、幽霊のように幽玄で、夢中になって、忘れられない、独特な俳優です。
2.The origins of stars of differing spectral types must be dissimilar.
異なるスペクトル型星の起源は必ず異なる。
3.The spectral sensitivity of various cells is very different.
各種光電管の分光感度は非常に異なる。
4.Colour filters are not very effective in isolating narrow spectral bands.
一部のカラーフィルタは狭いスペクトルバンドを効果的に分離できない。
5.Total radiation instruments employ some broad spectral band sensors.