Ju"glone (?), n. [L. juglans the walnut + -one.] Chem.
A yellow crystalline substance resembling quinone, extracted from green shucks of the walnut (Juglans regia); -- called also nucin.
<-- (MI11) C10H6O3. 5-hydroxy-1,4-naphthalenedione -->
© Webster 1913.