A valve arrangement in the cylinder head where the valves are at an angle to the cylinder bore. Canting the valves can make for a straighter path for air to flow into and out of the intake and exhaust ports. The area of an engine in which the air/fuel mixture is burnt.
There are lighters out there designed to burn up to 2500 degrees Celsius, so it is certainly possible to find one that is up to the task if you have a project that involves melting glass. One reason that most lighters will not melt glass is that they are simply not hot enough.
The wind-proof design of lighter (butane mini-torch) burns as high as 1100C according to Wikipedia. (http://en.m.wikipedia.org/wiki/L...) But that's with the fuel pre-mixed with air at the right ratio, which is not how a standard Bic works. So the real answer is definitely less than 1100C.