Interesting. The game never calls them "one-way fields" anywhere?
I checked again, and there is indeed one place, where the game gives the turning fields a name: When displaying the hint while hovering over the object in clear-physics more. However, in this case it is "FORCE ->" resp. "FORCE <-", which I don't consider to be too bad, but "TURN ->" resp. "TURN <-" would still be better.
And, yes, the "official" term used by namida and myself was (at least for some time now) "force field", not "one-way field". The later still occurs sometimes in old stuff, e.g. in the name "owf_left.png" in namida's new-formats psychedelic style.