Overnight rumination yields the logic tha it can only be called a meteorite after it has landed. That means after the crater has been made. So it is a meteor right up until the instant of the impact. In fact, the instant of impact is the same instant the object changes from meteor to meteoriteHi, greenish eve.
Julian is right, of course, about the difference between meteors and meteorites. Rocks from space that we find on the surface of the earth are always meteorites.
For some reason, though, "meteor (impact) crater" is the most popular term for those craters. You can certainly use it as many other writers do. Here is a paragraph about the term from a website about geology: "Meteor" is the proper term for the object as it streaks through Earth's atmosphere. "Meteorite" is the term used for the object after it has fallen to Earth's surface. "Meteor crater" is the most common usage for craters produced by a meteor impact.
I took a quick look at Google's results for meteor impact crater. From what I've seen, "meteor crater", "impact crater", and "meteor impact crater" are all in use.