Gayatri Mantra is a Hymn from the ancient Indian scripture RigVeda
The origin of the word 'Gayatri' approaches from Sanskrit phrase named Gayantam Triyate iti, and mentions that mantra saves the chanter from all kinds of unpleasant circumstances which may direct towards loss of life. Gayatri word clarifies the actual cause for the subsistence of this mantra.
Goddess Gayatri is also known as Mother of Vedas or 'Veda Mata', Rag Veda, Yajur Veda, Saam Veda and Atharva Veda because it is the source of Vedas, the authenticity behind the experienced and perceived universe.