SYN: indigo.
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in·dig·o·tin (in″dĭ-goґtin) a neutral, tasteless, dark blue powder, the principal ingredient of commercial indigo; called also indigo blue.Medical dictionary. 2011.
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in·dig·o·tin (in″dĭ-goґtin) a neutral, tasteless, dark blue powder, the principal ingredient of commercial indigo; called also indigo blue.Medical dictionary. 2011.