D defs.my
Entry 1 sense Webster, 1913

Nigrosine

· Ni·gro·sine · IPA
01 n. A dark blue dyestuff, of the induline group; -- called also azodiphenyl blue.
  1. 1.
    A dark blue dyestuff, of the induline group; -- called also azodiphenyl blue.(Chem.) Also: azodiphenyl blue