English

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

 

the Richter scale

 noun
noun
BrE BrE//ˈrɪktə skeɪl//
 
; NAmE NAmE//ˈrɪktər skeɪl//
 
[singular]
 
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a system for measuring how strong an earthquake is an earthquake measuring 7.3 on the Richter scale Word Origin 1930s: named after Charles F. Richter (1900–85), American geologist.
See the Oxford Advanced American Dictionary entry: the Richter scale