In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+03BA (GREEK SMALL LETTER KAPPA).
\bbalpha\bbbeta\bbchi\bbdelta\bbDelta\bbdotlessi\bbdotlessj\bbepsilon\bbeta\bbgamma\bbGamma\bfbbkappa
\bfbbkappaSymbol
The κ symbol (Greek small letter kappa, U+03BA), written as \bfbbkappa in LaTeX math mode.