The Siddhar (Tamil: சித்தர் cittar,) in Tamil tradition is a perfected individual, who has attained intellectual powers called siddhi by constant practice of certain educational disciplines.
They were knowledgeable in science, technology, astronomy, literature, fine arts, music, drama, dance, and provided solutions to common people in their illness and advice for their future.
Typically Siddhars were saints, doctors, alchemists and mystics all in one.
Tamil Siddhars were the first to develop pulse-reading ("naadi paarththal" in Tamil) to identify the origin of diseases.
The siddhars are believed to have had both major and minor powers which are described in detail in various yogic and religious texts.