- indigodisulfonic acid
- \\| ̷ ̷ ̷ ̷(ˌ) ̷ ̷+...-\ noun
Etymology: indigodisulfonic International Scientific Vocabulary indigo + disulfonic: a water-soluble disulfonic acid C16H8N2O2(SO3H)2 obtained by treating indigo with concentrated sulfuric acid — called also indigo extract, 5,5′-indigotindisulfonic acid
Useful english dictionary. 2012.