In the Nyingma tradition, one of the three lines of transmission of the inner three classes of tantra (kriya tantra, carya tantra and yoga tantra), received by a master in a pure vision of an emanation of a Buddha, when he or she gains realization through seeing a gesture made by the emanation.
Tibetan: རིག་འཛིན་བརྡ་བརྒྱུད། rig-'dzin brda-brgyud
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