indigo

indigo
[ˈɪndɪgəʊ]
(pl. -os -oes)
  1. a tropical plant of the pea family, which was formerly widely cultivated as a source of dark blue dye
    木蓝属植物
  2. Genus Indigofera, family Leguminosae: several species, in particular I. tinctoria
    木蓝属,豆科: 数种,尤指木蓝
  3. [mass noun]the dark blue dye obtained from this plant
    靛蓝;靛蓝染料
    ■a colour between blue and violet in the spectrum
    靛蓝色
    [as modifier]he dived into the indigo water.
    他潜入靛蓝色的水中。
语源
  1. mid 16th cent.: from Portuguese índigo, via Latin from Greek indikon, from indikos 'Indian (dye') (see Indic)
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