Prāṇa means breath and the vital energy carried by it. The Upaniṣads treat it as the chief of the bodily powers and sometimes as Brahman itself. Indian medicine and yoga distinguish five vital airs, and the control of the breath, prāṇāyāma, is a limb of yoga.
Prāṇa
Breath or life-force: the vital energy that sustains the body, and in the Upaniṣads a symbol of Brahman.
Also: Prana