Muhammad ibn Yusuf al-Harawi (Persian: محمد بن یوسف هروی, fl. 1492-1518 and died 1542) was a Persian late 15th century physician from Herat, Safavid Iran, now part of Afghanistan. In 1518 he composed, in Arabic, an alphabetical medical dictionary and encyclopedia. It covers anatomical and pathological terms and concepts, medicinal substances, and prominent physicians, with all the entries arranged alphabetically. This medical lexicon, titled 'Jawahir al-lughah wa-Bahr al-jawahir', has three chapters: the first explaining terminology for parts of the body (in alphabetical order), the second on the names of simple and compound drugs (also in alphabetical order), and the third on names of diseases, presented in order from head to toe according to their locations. An autograph copy of Jawahir