What key is this

[Snookerman]

This is a shortcut in cloud9: http://i.imgur.com/UeQqIvT.png but I can't for the life of me figure out what the round thing with the arrow is. I got the text version (⌃ ⎋) from the source code and I tried Google but found nothing. Thanks!

 

[ZakL]

It's the escape key: http://support.apple.com/kb/PH10564

 

[Snookerman]

It's the escape key: http://support.apple.com/kb/PH10564

Thank you!