noun Etymology: Congo, territory in Africa Date: 1885 an azo dye C 32 H 22 N 6 Na 2 O 6 S 2 that is red in alkaline and blue in acid solution and that is used especially as an indicator and as a biological stain
CONGO RED
Meaning of CONGO RED in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012