Chandrabindu
Chandrabindu is a diacritic sign with the form of a dot inside the lower half of a circle. It is used in the Devanagari, Bengali-Assamese, Gujarati, Odia, Tamil, Telugu, Kannada, Malayalam, Sinhala, Javanese and other scripts.
It usually means that the previous vowel is nasalized.
In Hindi, it is replaced in writing by anusvara when it is written above a consonant that carries a vowel symbol that extends above the top line.
In Classical Sanskrit, it seems to occur only over a lla, yya, or vva conjunct consonant, to show that it is pronounced as a nasalized double l, y, or v which occurs if they have become assimilated in sandhi.
In Vedic Sanskrit, it is used instead of anusvara to represent the sound anunasika when the next word starts with a vowel. It usually occurs where in earlier times a word ended in -ans.
Unicode
encodes chandrabindu and chandrabindu-like characters for a variety of scripts:- is a general-purpose combining diacritical mark intended for use with Latin letters in transliteration of Indic languages.