Adibuddha

In Vajrayana Buddhism, the ādibuddha (Tibetan: དང་པོའི་སངས་རྒྱས། dang-po'i sangs-rgyas), is the "First Buddha." The term reemerges in tantric literature, most prominently in the Kalachakra. Ãdi means “first” such that the ādibuddha was the first to attain Buddhahood. ādi means “primordial,” not referring to a person but to an innate wisdom that is present in all sentient beings. In Tibetan Buddhism, the term ādibuddha is often used to describe Samantabhadra or Vajradhara. In East Asia, the ādibuddha is typically considered to be Vairocana. According to the Dalai lama, Adi Buddha is also seem in Mahayana Buddhism as representation of the universe, its laws and its true nature, as a source of enlightenment and karmic manifestations and a representation of the Trikaya.

...
Wikipedia