What does CkC mean in chemical bonding? I'm working on a chemistry question where I'm supposed to use average bond energies to estimate enthalpy changes for a reaction. It gives me these bond energies to work with:

$$\begin{align}
\ce{C-H}&amp;=&amp;413\\
\ce{C-C}&amp;=&amp;348\\
\ce{C-Br}&amp;=&amp;276\\
\ce{H-Br}&amp;=&amp;366\\
\ce{CkC}&amp;=&amp;614\\
\end{align}$$
I know how to do the question, but I don't what $\ce{CkC}$ is. I can't find it online or in my textbook. What does the "k" mean?
$\ce{C=C}$ average bond energy is somewhere around $\pu{614 kJ/mol}$ so "k" probably indicates a double bond