Hiranyagarbha
means "golden egg"; gold germ; the cosmic form of the self; cosmic womb; creator of the subtle universe
It is the subtle vesture. It is the form of all the individuals together or the only individual. IT IS THE SEED OF THE UNIVERSE. It is also known as sutratman. The Rg Veda says, "Hiranyagarbha arose in the beginning; born, he was the one lord of things existing."
Its also a name of God, the Creator as born from a golden egg. This egg was formed from the seed deposited in the primordial waters by the self-existent Brahman on the eve of creation. The seed took the form of a golden egg, out of which Brahman was born as Brahma, the creator. It also means the soul invested by the subtle body. Various synonyms for this term include mahat, virat, Isvara and saguna Brahman.