What is "hamsanadam"

Hamsanadam (pronounced hamsanādam) is a rāgam in Carnatic music (musical scale of South Indian classical music). It is a pentatonic scale (audava rāgam, which means "of 5"), as it is sung in current days. It is a derived scale ( janya rāgam), as it does not have all the seven swaras (musical notes), from the 60th Melakarta rāgam Neetimati.