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Definition of the Richter scale noun from the Oxford Advanced Learner's Dictionary

the Richter scale

noun
 
/ðə ˈrɪktə skeɪl/
 
/ðə ˈrɪktər skeɪl/
[singular]
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  1. a system for measuring how strong an earthquake is
    • an earthquake measuring 7.1 on the Richter scale
    Word Origin1930s: named after Charles F. Richter (1900–85), American geologist.
See the Richter scale in the Oxford Advanced American Dictionary
Check pronunciation: the Richter scale

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noun
 
 
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