Bible Dictionaries
Oa Powder
Webster's Dictionary
A bitter powder (also called araroba) found in the interspaces of the wood of a Brazilian tree (Andira araroba) and used as a medicine. It is the material from which chrysarobin is obtained.
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Bibliography Information
Webster, Noah. Entry for 'Oa Powder'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/o/oa-powder.html. 1828.