| ̷ ̷ ̷ ̷+...- noun
or brom·thymol blue (ˈ)brōm+...-
Etymology: International Scientific Vocabulary brom- + thymol
: a brominated dye C 27 H 28 Br 2 O 5 S of the sulfonephthalein series derived from thymol that is obtained as a cream to rose colored powder and is used as an acid-base indicator