This is first Lexicographic Book in the History of Lexicography in Lexico-graphical form for a Greatest Revolutionist thinker cum philosopher in the Middle of 9th Century A.D. After very long discussion with great scholars, the word Lexicography has been coined for this book and named the title Lexicography of Ramanujacharya. The book cover entire life history of Ramanujacharya, a founder of Visistha-vaitham, and his 74 simhasanas (disciples) in elaborate manner of their contribution to physical, religious, temple, literary and philosophical works.