Chakras: A chakra is a spinning vortex of energy created within ourselves by the interpenetration of consciousness and the physical body. Through this combination, chakras become centers of activity for the reception, assimilation, and transmission of life energies. Uniting the chakras is what we experience as the "self." The word chakra comes from the Sanskrit word for "wheel" or "disk" and originated within the philosophy of the ancient yoga systems of India.
source: Truth about Chakras