the cool guys all just say shcrund.. I'm not cool though. I usually just refer to everything as a slot, or crack... creveases, moats, glide cracks, and bergshrunds. don't slide into the slot.
would have to look at a summer satelite view, but I am pretty sure Killclimbz crossed a schrund on shuksan the first time he visited... definatly over a few slots.