Prana ()'s the Sanskrit for "breath" (from the root "to fill", cognate to Latin plenus "full").It's one of the five organs of vitality or sensation, viz. prana "breath", vac "speech", caksus "sight", shrotra "hearing", and manas "thought" (nose, mouth, eyes, ears and mind; ChUp. 2.7.1). In Vedantic philosophy, it's the notion of a vital, life-sustaining force of living beings and vital energy, comparable to the Chinese notion of Qi. Prana's a central concept in Ayurveda and Yoga where it's beli… (More on Prana)