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CRATER
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A bowl-shaped depression formed by the impact of a meteorite or bomb
Classified under:
Nouns denoting natural objects (not man-made)
Hypernyms ("crater" is a kind of...):
depression; natural depression (a sunken or depressed geological formation)
Hyponyms (each of the following is a kind of "crater"):
collector (a crater that has collected cosmic material hitting the earth)
lunar crater (a crater on the Earth's Moon)
Sense 2
Meaning:
A faint constellation in the southern hemisphere near Hydra and Corvus
Classified under:
Nouns denoting natural objects (not man-made)
Instance hypernyms:
constellation (a configuration of stars as seen from the earth)
Sense 3
Meaning:
A bowl-shaped geological formation at the top of a volcano
Synonyms:
crater; volcanic crater
Classified under:
Nouns denoting natural objects (not man-made)
Hypernyms ("crater" is a kind of...):
formation; geological formation ((geology) the geological features of the earth)
Hyponyms (each of the following is a kind of "crater"):
caldera (a large crater caused by the violent explosion of a volcano that collapses into a depression)
maar (a flat-bottomed volcanic crater that was formed by an explosion; often filled with water)
Holonyms ("crater" is a part of...):
volcano (a mountain formed by volcanic material)
II. (verb)
Sense 1
Present simple (first person singular and plural, second person singular and plural, third person plural) of the verb crater
Context examples:
Researchers found deposits of bright material in 10 of these craters.
(Where is the Ice on Ceres?, NASA)
The crater floor is largely free of impacts, and it contrasts sharply in color from older parts of the surface.
(New Ceres Images Show Bright Craters, NASA)
The uneven distribution of craters indicates that the crust is not uniform, and that Ceres has gone through a complex geological evolution.
(Ceres' Geological Activity, Ice Revealed in New Research, NASA)
The problem is that many experts assumed that early Earth craters have been worn away by wind, storms, and other geologic processes.
(Moon Data Sheds Light on Earth’s Asteroid Impact History, NASA)
Blackened rocks and mounds of lava I had already seen everywhere peeping out from amid the luxuriant vegetation which draped them, but this asphalt pool in the jungle was the first sign that we had of actual existing activity on the slopes of the ancient crater.
(The Lost World, by Sir Arthur Conan Doyle)
Now, a new study led by researchers at The University of Texas at Austin has confirmed it by finding hard evidence in the hundreds of feet of rocks that filled the impact crater within the first 24 hours after impact.
(Rocks at asteroid impact site record first day of dinosaur extinction, National Science Foundation)
On Ceres, ice is not just localized to a few craters.
(Where is the Ice on Ceres?, NASA)
Haulani Crater, with a diameter of 21 miles (34 kilometers), shows evidence of landslides from its crater rim.
(New Ceres Images Show Bright Craters, NASA)
Scientists also calculated the ratio of various craters' depths to diameters, and found that some amount of crater relaxation must have occurred.
(Ceres' Geological Activity, Ice Revealed in New Research, NASA)
Large craters formed by asteroid impacts in the last billion years are covered by boulders and rocks, while older craters have few rocks, Diviner data showed.
(Moon Data Sheds Light on Earth’s Asteroid Impact History, NASA)
