Mantra
A mystical formula or invocation; a word or formula, often in Sanskrit, to be recited or sung for the purpose of intensifying the action of the Spirit of God in man. A form of prayer consisting of a word or a group of words that is chanted over and over again to magnetize a particular aspect of the Deity or of a being who has actualized that aspect of the Deity.
See also
For more information
Mark L. Prophet and Elizabeth Clare Prophet, The Science of the Spoken Word.
Sources
Mark L. Prophet and Elizabeth Clare Prophet, Saint Germain On Alchemy: Formulas for Self-Transformation.