Noun
anusvara (plural anusvaras)
A diacritic used in Indic scripts as a nasal consonant.
anusvāra (plural anusvāras)
Alternative spelling of anusvara
In most cases, this is actually the same as the Sanskrit accusative case ending, which is also /m/ (or, allophonically, anusvara due to the requirements of the sandhi word-combining rules) in the neuter nominative. Source: Internet
The anusvara (often called binduva 'zero' ) is represented by one small circle ං (Unicode 0D82), Karunatillake (2004), p. xxxii and the visarga (technically part of the miśra alphabet) by two ඃ (Unicode 0D83). Source: Internet