treasure-revealer, revealer of treasure texts concealed mainly by Guru Rinpoche and Yeshe Tsogyal in the 9th century
Literally treasure-finder. They have been entrusted by Guru Rinpoche to reveal a hidden teaching. It is believed that the students of Guru Rinpoche have continued to eminate in the forms of Tertons in successive centuries to reveal these treasures.
(Tib): one who rediscovers and reveals 'hidden treasure teachings' or TERMA.