Tertön (Tibetan: གཏེར་སྟོན་, Wylie: gter ston) is a term within Tibetan Buddhism. It means a person who is a discoverer of ancient hidden texts or terma. Many tertöns are considered to be incarnations of the twenty five main disciples of Padmasambhava. A vast system of transmission lineages developed. Nyingma scriptures were updated by terma discoveries, and terma teachings have guided many Buddhist and Bon practitioners.
According to generally accepted history, the rediscovering of terma began with the first tertön, Sangye Lama (1000–1080). Tertöns of outstanding importance were Guru Chowang (1212–1270), Rigdzin Gödem (1307–1408), Dorje Lingpa (1346–1405), Ratna Lingpa (1403–1478), Pema Lingpa (1450–1521), Namchö Mingyur Dorje (1645–1667), and Jigme Lingpa (1729–1798), Jamyang Khyentse Wangpo (1820–1892) and Orgyen Chokgyur Lingpa (1829–1870).
The "seal" of all tertöns is said to have been Jamyang Khyentse Wangpo (1820–1892). In one of his visions, he could clearly see all the terma that were hidden throughout Tibet and other countries. He was the only master in Tibetan history to have not only received, but also transmitted the "seven transmissions" (bka' babs bdun), that are the canonical teachings, treasures taken from the earth, reconcealed treasures, mind treasures, recollections, pure visions, and aural transmissions received in visions. (Ricard, undated).