Definition - What does Hridayam mean?
Hridayam is a Sanskrit word that is typically translated as “heart” or “that which nourishes and heals the heart.” The word also means “soul,” “true/divine knowledge” and “essence (of something).”
Aditya Hridayam is a hymn or holy prayer to the Hindu sun god, Aditya, also known as Surya. It is included in the epic poem, Ramayana, although it likely predates the 5,000-year-old poem. The "Ramayana" describes the journey of Rama, who was an avatar of Lord Vishnu.
Yogapedia explains Hridayam
The "Ramayana" describes a battle between Rama and the multi-headed demon king, Ravana. The sage, Agastya, taught Rama the Aditya Hridayam in order to worship the sun god and plead for his help to defeat Ravana.
Hridayam also describes a trademarked method of yoga and meditative practice that combines mental techniques of Kundalini yoga with Tibetan Tantra, as well as other Eastern practices, such as martial arts and aspects of Daoism. The Hridayam Method originated in the 1980s in Russia, and the Hridayam School was established in California in 1994.