noun see: indigo Date: 1859 an indigo-forming substance C 8 H 7 NO 4 S found as a salt in urine and other animal fluids, a glucoside C 14 H 17 NO 6 occurring especially in the indigo plant and being a source of natural indigo
INDICAN
Meaning of INDICAN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012