Any of a group of orange and yellow sulphonated azo dyes, some of which are used as pH indicators. Frequently with capital letter, numeral, etc., as a postpositive, denoting a particular dye of this group, as "tropaeolin O".
Today’s NYT Connections Answers Mar 28, #291 - Daily Updates & Hints
Today’s Wordle Answer Mar 28 #1013- NYT Wordle Hints & Updates
NYT Mini Crossword Answers Today - The Mini for Mar 28 Solved