Drop; dot; seed; the essence of an energy or phenomenon; the dot over the mantra OM, suggesting transcendence. In Ayurveda, it represents semen and the vital energy of the human being. According to the yogic tradition, the bindu (understood as subtle energy) can be experienced and controlled at two different levels: the reproductive organs (the seat of the physical bindu) and bindu visarga (the seat of the subtle bindu-nectar), in the head.