noun, Chemistry.
any of a group of azo dyes derived from benzidine that will dye cotton and other vegetable fibers without the aid of a mordant.

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  • Congo-free-state

    noun 1. a former name of the Democratic Republic of the Congo. noun 1. a former name (1885–1908) of (Democratic Republic of) Congo (sense 2)

  • Congolese

    [kong-guh-leez, -lees] /ˌkɒŋ gəˈliz, -ˈlis/ adjective 1. of or relating to the People’s Republic of the Congo or the Congo region, its inhabitants, or their languages. noun, plural Congolese. 2. an inhabitant or native of the People’s Republic of the Congo or of the Congo region. /ˌkɒŋɡəˈliːz/ adjective 1. of or relating to the Republic […]

  • Congophilic angiopathy

    congophilic angiopathy con·go·phil·ic angiopathy (kŏng’gō-fĭl’ĭk) n. A condition of blood vessels characterized by deposits in the vessel walls of a substance, usually amyloid, that is easily stained by Congo red.

  • Congo-red

    noun, Chemistry. 1. a water-soluble powder, C 32 H 22 O 6 N 6 S 2 Na 2 , one of the Congo colors that is not acid-fast or lightfast: used chiefly as a dye, biological stain, and chemical indicator. noun 1. a brownish-red soluble powder, used as a dye, a diagnostic indicator, a biological […]

  • Congo-snake

    noun 1. any of several eel-shaped salamanders, as the amphiuma or siren.

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