@varve ah,, true, now that you mention I remember I heard it used like that about fabric. I was just stuck on yarn.
I think what @Satsuma meant was that because the same colour in one line often touches/overlaps with that same colour in the next line, the "print" of the yarn here creates pathways up and down the finished piece.
@Satsuma I have no idea if there is a word. Thank you!