Nāga is the Sanskrit and Pāli word for a minor deity taking the form of a very large snake—specifically the king cobra, found in Hindu and Buddhist mythology, Jainism and Sikhism. The use of the term nāga is often ambiguous, as the word may also refer, in similar contexts, to one of several human tribes known as or nicknamed "Nāgas"; to elephants; and to ordinary snakes, particularly the King Cobra and the Indian Cobra, the latter of which is still called nāg in Hindi and other languages of India. A female nāga is a nāgī or nāgiṇī.
Example via www.ramdass.org: Story About Sombari Maharaj