Col

We spent half an hour on the summit before returning to our camp, where we stuffed the frozen tent and all the gear into our packs and started the long descent of the southwest ridge to rejoin Harish and others who were still encamped on the col at the foot of it.

Source: wiktionary

I recall one specific trip when we climbed to Madison Hut which is located in the col between Mount Madison and Mount Jefferson.

Source: wiktionary

Turn left through a gate in the right angle of the wall and drop down to a col before climbing up the hill.

Source: wiktionary