Canon SLRs Lenses

I know the bigger the aperture the faster the shutter speed, but is there a technical name for such a lens? I want to get one that I can use in dim lighting conditions but don’t know what exactly to ask for.
Not a tripod or remote shutter release, got those already!

I know the bigger the aperture the faster the shutter speed, but is there a technical name for such a lens? I want to get one that I can use in dim lighting conditions but don’t know what exactly to ask for.
Not a tripod or remote shutter release, got those already!