Dhyānottara-paṭala. A key kriyā-tantra work only surviving in Tibetan translation, puportedly a chapter (paṭala) from the lost Vajroṣṇīṣa Tantra, it comprises 74 verses on the basics of tantric mantra recitation and meditation. A detailed commentary also exists by the early Indian tantric scholar Buddhaguhya.

A Dictionary of Buddhism, Oxford University Press, 2003, 2004 (which is available in electronic version from answer.com)