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Definition of: goldenseal
(gōl′dən·sēl′) noun
1. An herb (Hydrastis canadensis) of the United States, with a yellow rootstock, a single radical leaf, a hairy stem, and a single greenish-white flower.
2. This plant's rootstock.
On line AB, square ABIG is constructed; AG is bisected at C, whereby CD = CB, and square DEFA is constructed. Ratio: DA:AG::AG:DG.
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