indican

/IH0 N D IH1 K AH0 N/
noun
  1. 1

    A glucoside obtained from woad and other plants, the source of natural indigo.

  2. 2

    An indigo-forming substance found in urine and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin); an indoxyl sulphate of potash.

Synonyms

Source: https://en.wiktionary.org/wiki/indican