Yup it is used to descibe that too.
I get the feeling it is one of those terms that means different things to different people. It is the term I used to describe the same point of the wing of a 727-100 to our new guys when I was a Reeve.
The MD-80 is not an airplane that you can get complacet with in winter. If you watch one on the ground sometimes you will see a ramper or mechanice walk up to the trailing edge with a four foot long rod and a stepladder. What he is checking is these three wicks that are on the top of the wing right against the fuselage. He taps each of them with the rod to see if ice comes off. The MD-80 has pretty thin wing skins compared to other airliners. So what happens the airplane goes up to altitude during a flight the fuel in the wing cools off to the temperture up there. Very Cold. The plane lands and what happens it that the mositure in the air condenses and freezes against the wing which is chilled by the fuel inside. Since the de-iceing equiptment only covers the leading edge it is in effective agaist this ice formation. Also this actually isn't as big as a problem when the temperture is very cold as opposed to around the freezing point. This is because the colder the air get the less mositure it can hold. Still when I was working for Alaska they tried to keep from sending MD-80's north of Seattle during winter. This is probably the big reason why they want to go to an all-737 fleet, they go through a lot of glycol on the MD-80's.
I probably told this story before but it is a good one.
Up untill last December Alaska Airlines flew flights from Alaska to the Russian Far East. They used the MD-80's for these flights because of their longer range. They landed one at Magadan(Or Vladivostok, I forget) and after they had landed they found out they where out of de-icing fluid. Since they needed to de-ice the plane, the airport personell came up with a novel solution. They drove the truck down to the local distillery and filled it up with Vodka. I understand the FAA had a feild day with them using an unapproved de-icing fluid.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.