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Webster 1913 Edition

Juglone

Ju′glone

,

Noun.

[L.

jugl

ans the walnut +

-one

.]

(Chem.)

A yellow crystalline substance (

C10H6O3

) resembling quinone, extracted from green shucks of the walnut (

Juglans regia

); – called also

nucin

. Chemically, it is

5-hydroxy-1,4-naphthalenedione

.