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n.1.(Physiol. Chem.) A yellow acid substance formed by the action of hot nitric acid on albuminous or proteid matter. It is changed to a deep orange-yellow color by the addition of ammonia.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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pinnata applications, the phytochemical properties have been characterized as alkaloids, flavonoids, phenols, saponins, quinones, tannins, carboxylic acids, proteins, xanthoproteins, coumarins, steroids, and carbohydrates [18].