Rāhu

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun Buddhism a supernatural being the Tibetan Buddhist tradition, particularly the Nyingma lineage. Usually depicted as dark blue in colour and having nine heads one of which is that of a raven. He has a face in his belly the mouth of which swallows up the moon or sun during eclipses. He is master of the nine planets and the god of solar and lunar eclipses.