Penal Code 664 is the section in the Penal Code for an attempt. Penal Code 187 is the section in the Penal Code for Murder. Therefore, a violation of Penal Code 664/187 is what is commonly called an attempt murder.
Attempted murder. If you or any other reader is ever interested in finding out what a Penal Code section means, you can always do a quick Google search. It is usually an easy and quick means of finding the answer, or viewing the text of a statute. (Note: obviously, the advice of an attorney is always the better option if you have the means to speak with one, or the time to post on Avvo.)