Thiruvengadam Rajendram Seshadri FNA, FRS was an Indian chemist, academic, writer and the Head of the Department of Chemistry at the University of Delhi, known for his researches on the Indian medicinal and other plants.
He was a Fellow of the Royal Society, UK and an elected member of the German Academy of Sciences Leopoldina.
Besides several articles, he also published two books, Chemistry of Vitamins and Hormones and Advancement of Scientific and Religious Culture in India.
The Government of India awarded him the third highest civilian honour of the Padma Bhushan, in 1963, for his contributions to Science.