Bindu.
Bindu (Sanskrit: बिंदु) is a Sanskrit word meaning “point” or “dot”. A Bindi is a small, ornamental, devotional dot applied to the forehead in Hinduism. In metaphysics, Bindu is considered the point at which Creation begins and may become Unity. It is also described as “the Sacred Symbol of the Cosmos in its Unmanifested State.” Bindu is the point around which the Mandala is created, representing the Universe. It is often merged with seed (or sperm) and ova. In the Yoga Chudamani Upanishad Bindu is a Duality, with a white Bindu representing Shukla (sperm) and a red Bindu representing Maharaj (menses). The white Bindu resides in the Bindu Visarga and is related to Shiva and the Moon, while the red Bindu resides in the Muladhara Chakra and is related to Shakti and the Sun. In yoga, the Union of these two parts results in the Ascension of Kundalini to the Sahasrara.