Perhaps "atheist".

Good grief.
Disbelief is refusal to believe. This is the same bias as faith (refusal to deny). This is not the position you claim to have. Your position is quite different: that you do not believe in things for which you do not have compelling evidence.
It is up to you what you choose to label yourself but I am just pointing out, as is the OP, that the normal/traditional definition of atheism is belief that there are no gods. It is a prejudiced position.
Dawkins weasels his way around this by calling himself an atheist but defining himself as an 86% atheist. I think he chose to use the term atheism because it is a common term and sounds as if it could mean anti-theism. But science is not atheistic - it is sceptical and empirical.