Where is the full defense combat maneuvre?

[Goblyn]

I can't seem to find it. Is it even in 3.x? If so, can anyone steer me in the right direction?

Thanks in advance.

 

[Len]

"Total Defense" is on p. 142 of the 3.5 PHB. And I might as well paste it in from the SRD:

You can defend yourself as a standard action. You get a +4 dodge bonus to your AC for 1 round. Your AC improves at the start of this action. You can’t combine total defense with fighting defensively or with the benefit of the Combat Expertise feat (since both of those require you to declare an attack or full attack). You can’t make attacks of opportunity while using total defense.