crater

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crater

 [kra´ter]
an excavated area surrounded by an elevated margin, such as is caused by ulceration.

cra·ter

(krā'ter),
The most depressed, usually central portion of an ulcer.
References in periodicals archive ?
Researchers believe they have identified the impact crater created by a massive asteroid strike on Mars.
Furthermore, according to scientists, the Moon is immune to processes like plate tectonics that gradually destroy the Earth's craters.
The crater is about 1,100 meters (3,600 feet) across and 120 meters deep, with a rim height above the surrounding plain of 60 m.
The second Meteor Crater Experiment (METCRAX II) was conducted in October 2013 at Arizona's Meteor Crater.
The researchers don't think that any truly massive undiscovered craters are still lurking on Earth's surface, but Don McCarthy is not so sure.
"While the distribution of brightness was not exactly what we had expected, practically every measurement related to ice and other volatile compounds on the moon is surprising, given the cosmically cold temperatures inside its polar craters."
Substrate contaminants cause craters because the paint does not wet the contaminated area or immediately dewets from it.
Scientists studying a crater in California's Death Valley have determined that not only is it much younger than previously thought, but the conditions that created it could still exist.
Sometimes when a large meteorite hits the ground, the impact creates a crater. The chart below lists several large craters found in the United States.
Since early 2010, the Oil & Gas Ministry has been considering development of two of the giant gas craters near the Darvaza crater.
While craters normally possess round rims, atypical geometries do exist.
Although many small craters have formed since then, none so far have been large enough to show up in telescopes.