`  : I don't think you're going to have much luck distinguishing between the two mathematical notions of geodesic on grammatical grounds.  Geodesic may be used either as a noun or an adjective to refer to quantities which involve geodesics (n).  Likewise, I have seen geodetic (adj) used in this way — although it is uncommon (see, for instance, Penrose and Rindler ``Spinors and Space-time``).  It appears that geodesic grid is just fine as a see also: I had checked it before reverting.  It seems to discuss geodesics in the sense this article talks about.  Maybe I am missing something, since you assure me that the geodesics over there are different from the geodesics here.  Perhaps you need to remove the link from that article as well?   `