Pharmacopoeia, pharmacopeia, or pharmacopoea, (literally, 'drug-making'), in its modern technical sense, is a book containing directions for the identification of samples and the preparation of compound medicines, and published by the authority of a government or a medical or pharmaceutical society.
Descriptions of preparations are called monographs.
In a broader sense it is a reference work for pharmaceutical drug specifications.
Read more about Pharmacopoeia: Etymology, History, Medical Preparations, Uses and Dosages