Monier-Williams Sanskrit-English Dictionary
m. (fr. rabh; cf. graha and grah) the Seizer, N. of a Daitya daitya or demon who is supposed to seize the sun and moon and thus cause eclipses (he is fabled as a son of Vipra-citti vipra-citti and Sin6hika1 siṃhikā and as having a dragon's tail; when the gods... m. an eclipse or (rather) the moment of the beginning of an occultation or obscuration VarBr2S. 113452 880,1 177900 w.r. for rāhūgaṇya q.v. 113453 880,1...
