Hiraṇyagarbha appears in a hymn of the Ṛg Veda as the golden germ from which the world arose. In later Vedānta it names the cosmic subtle body, the totality of minds, the first manifestation of Brahman in creation.
Hiraṇyagarbha
The golden embryo: in Vedic thought, the first-born source of the universe, later the cosmic mind.
Also: Hiranyagarbha