noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A dark blue synthetic dyestuff of the induline group. countable, uncountable

Synonyms

All synonyms

azodiphenyl blueazodiphenyl blue

Etymology

Latin niger (“black”), + -ine.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.