An allelopathic aromatic mixture found in the leaves, roots, husks, and bark of flowers in Juglandaceae household, specially the black colored walnut, used as a colouring representative.
A yellow crystalline substance (C10H6O3) resembling quinone, obtained from green shucks regarding the walnut (Juglans regia); -- called also nucin. Chemically, it's 5-hydroxy-1,4-naphthalenedione.
A yellowish- or brownish-red element, HOC10H5O2. prepared by the oxidation of a-hydrojuglone from the green components of the walnut-tree; a-hydroxynaphthoquinone, nucin, or regianin. It crystallizes in needles or prisms and melts at 151–154° C.
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...