indigo

Indigo is a flowering plant that's native to Asia, and it's also the name of a deep blue dye made from the leaves of the indigo plant. You can also use the word to mean the shade of blue itself.

The indigo plant is in the pea family. While this plant often has brightly colored flowers, indigo dye is traditionally made from the plant's leaves. This type of tint was once the most common natural dye in the world — though today, most of what's called indigo is synthetically made. Indigo is also one of the colors of the rainbow: red, orange, yellow, green, blue, indigo, and violet. The Greek root indikon means "blue dye from India."

Definitions of indigo
  1. noun
    deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye
    synonyms: Indigofera tinctoria, indigo plant
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    types:
    Indigofera anil, Indigofera suffruticosa, anil
    shrub of West Indies and South America that is a source of indigo dye
    type of:
    bush, shrub
    a low woody perennial plant usually having several major stems
  2. noun
    a blue dye obtained from plants or made synthetically
    synonyms: anil, indigotin
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    type of:
    dye, dyestuff
    a usually soluble substance for staining or coloring e.g. fabrics or hair
  3. noun
    a blue-violet color
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    type of:
    reddish blue, violet
    a variable color that lies beyond blue in the spectrum
  4. adjective
    having a color between blue and violet
    indigo flowers”
    Synonyms:
    colored, colorful, coloured
    having color or a certain color; sometimes used in combination
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