As far as I know, they’re only called feedback nodes. Changing the direction doesn’t change their functionality. It just makes the code ‘flow’ more smoothly sometimes.
I guess it’s not technically called a feed forward node, but that’s what I have come to call them for reasons that are unclear to me. I think one of our mentors called it that, and it stuck.
But it does go forward…so I think I’m gonna stick to the “feed forward” name. 
Rather than feed forward, how about previous value or delay by one or some name that explains its purpose rather than its appearance.
Greg McKaskle
When I’m teaching it I use Greg’s suggestion and just call it the “previous value”
*How about calling it a Z-1 node?
Just kidding. That doesn’t help new learners.
I like Mark & Greg’s “previous value” moniker. Students seem to understand that phrase immediately, and it’s accurate.
@bvisness: the reason I said “feedforward node” is unfortunate is because feedforward has a completely different meaning in control theory.
“Previous Value” is nice, so I think I’ll try to call it that from now on. (And I was unaware that “feed forward” has another meaning in control theory…sorry about the confusion.)