Fujita scale

 

Entry from US Dictionary

Pronunciation: /fo͞oˈjētə/
(also Fujita-Pearson scale)

noun

Meteorology
  • a scale of tornado severity with numbers from 0 to 6, based on the degree of observed damage.

Origin:

mid 20th century: named after Dr. Tetsuya Theodore Fujita (1920–1988), the meteorologist who chiefly devised it