I can remember hearing this combination of sounds several times, and the way it's used makes me think that it's a part of a common phase or saying. Particularly I can point to two cases where it was used in Ergo Proxy episode 1. In one case, it had the following usage, with the meaning that two events that were just mentioned are probably connected.
てんとてん は せい に なる
I'm not writing that with any kanji because this was just heard, and I can't claim to know any of the meanings with total confidence.
I know there was another place てんとてん was used, and I think it was within a repeated phrase. It went something like this:
てんとてん を 結ぶ ...
I'm trying to locate where this was said. The next word might have been そうな and then something else, but I'm less sure about that part.
It's not in the Jim Breen dictionary, nor is any other similar pronunciation I can think of. I also don't see very much particularly on Google. Still, I'm sure about this usage and I hope that a native speaker will see these sentences and know right away what it's saying.