[ 'rɪktə ]
■ noun Geology a logarithmic scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
Origin
1930s: named after the American geologist Charles F. Richter .
[ 'rɪktə ]
■ noun Geology a logarithmic scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
Origin
1930s: named after the American geologist Charles F. Richter .
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004