The LaTeX command for bigodot (⊙) is \bigodot.
\bigodotWriting a paper? The table generator and the BibTeX cleaner are one click away, no account.
Write \bigodot inside math mode, that is between $…$ for inline math or in a \[ … \] or equation block for display math. It is part of core LaTeX math, so no extra package is required.
\bigodot is a math-mode symbol: in running text, wrap it in $...$. With unicode-math under XeLaTeX or LuaLaTeX, typing ⊙ in a formula gives the same symbol.
Open this example in the live preview: it renders as you type, with no compiler and no signup.
\alephx'x''\angle\measuredangle\triangle\diamond\bigoplus\bigotimes\mathcal{L}\mathcal{H}\mathcal{F}\mathcal{A}\mathcal{B}More math symbols in LaTeX: the full table or search all 350+ LaTeX symbols.
Use \bigodot in math mode; it needs no extra package. For example, $\bigodot$.
None: \bigodot is built into LaTeX, so no extra package is required.