The use of (mainly Sanskrit) prayer formulas, incantations or phrases called mantras (Tibetan: "sngags") is another widespread feature of Tibetan Buddhist practice. So common is the use of mantras that Vajrayana is also sometimes called ""Mantrayāna"" (the mantra vehicle). Mantras are widely recited, chanted, written or inscribed, and visualized as part of different forms of meditation. Each mantra has symbolic meaning and will often have a connection to a particular Buddha or Bodhisattva. Each deity's mantra is seen as symbolizing the function, speech and power of the deity.