Bindu - Common yantras have the Bindu because the central position of your yantra. It is claimed to generally be the symbolic representation of the first sort, generally known as ellipsoid or linga. The term yantra implies "device" or "instrument" in Sanskrit. It may imply "help" or "assist," similar to https://spencerwfmsy.blogsidea.com/42212732/what-does-totke-mean