Symbol of Dot inside a circle [duplicate]

Question

I am looking for this symbol which I haven't found online (especially with a large dot inside the circle) .

Answer 1

Build your own...

\documentclass{article}
\usepackage{stackengine,scalerel}
\newcommand\eye{\ensurestackMath{\stackinset{c}{}{c}{-.33pt}%
  {\bullet}{\bigcirc}}}
\newcommand\smallereye{\scalerel*{\eye}{x}}
\begin{document}
x\eye\smallereye
\end{document}

Here's an alternative

\documentclass{article}
\usepackage{stackengine,scalerel}
\newcommand\eye{\ensurestackMath{\stackinset{c}{}{c}{-.3pt}%
  {\bullet}{\scriptstyle\bigcirc}}}
\newcommand\smallereye{\scalerel*{\eye}{x}}
\begin{document}
x\eye\smallereye
\end{document}

Answer 2

amssymb has a \circledcirc command which outputs an empty circle inside a bigger circle, but I don't think there's a similar command where the inner circle is filled. You could however start from \circledcirc and stack a \bullet on it.

\documentclass[11pt]{article}
\usepackage{amssymb}
\newcommand*{\circledbullet}{%
    \mathbin{%
        \ooalign{$\circledcirc$\cr\hidewidth$\bullet$\hidewidth}%
    }%
}
\begin{document}
\( \circledbullet \)
\end{document}

Answer 3

Contrary to this answer, I wouldn't use a phonetic symbol. Unsurprisingly, Unicode provides a CIRCLED BULLET symbol (U+29BF). To see the difference, compare the circled bulled (left) with the bilabial click (right) in different fonts.

%Use LuaLaTeX or XeLaTeX
\documentclass{standalone}
\usepackage{fontspec}
%http://www.quivira-font.com/
\newfontfamily\quivira{Quivira}
\newfontfamily\symbola{Symbola}
\newfontfamily\notosans{Noto Sans}
\newfontfamily\notosansmath{Noto Sans Math}
\newfontfamily\charissil{Charis SIL}
\begin{document}
%Circled bullet
\quivira\char"29BF\relax
\symbola\char"29BF\relax
\notosansmath\char"29BF\relax
\quad
%Latin letter bilabial click
\quivira\char"298\relax
\symbola\char"298\relax
\notosans\char"298\relax
\charissil\char"298\relax
\end{document}

Answer 4

As complement, as it's not exactly the fat dot you're looking for.

From unicode:

• ⊙ (U+2299, cicled dot operator)
• ⨀ (U+2A00, n-ary circled dot operator)
• ☉ (U+2609, sun)

From Latex:

• \odot usually for the unit solar mass

Answer 5

It is possible to use also the symbol \faDotCircle[regular] taken from fontawesome5 package.

\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\usepackage{fontawesome5}
\newcommand{\cirbd}{\mathrel{\text{\faDotCircle[regular]}}}


\begin{document}
$a\cirbd B$, $A_{\cirbd} B$, $A^{\cirbd} B$
\end{document}

Addendum: Stix font have also a specific symbol named \fisheye.

\documentclass[a4paper,12pt]{article}
\usepackage{stix}

\begin{document}
$a\fisheye b$
\end{document}

Answer 6

You can also use TikZ to build your own:

\documentclass{article}
\usepackage{tikz}
\newcommand{\ofatdot}{\mathbin{\tikz{\draw[line width=0.25pt] (0,0) circle[radius=0.7ex];\draw[fill] (0,0) circle[radius=0.3ex];}}}
\begin{document}
$a \ofatdot b$
\end{document}

This produces:

As always, this can be improved; in particular, the vertical alignment's not the same as for e. g. \odot, which may be undesirable.

Answer 7

Depending on the context (so probably not for the OP, but potentially for others), this symbol is in the International Phonetic Alphabet and represents a bilabial click (aka "kiss"). Hence it is in Unicode, with codepoint U+0298 . Here it is: ʘ

If you use one of the Unicode-ready TeX variants, you can wrap it in a \mathrel and you are done.