Mercalli scale

[mer-kah-lee, mer-; Italian mer-kahl-lee]
noun Geology.
a measure of earthquake intensity with 12 divisions ranging from I (felt by very few) to XII (total destruction).

1920–25; named after Giuseppe Mercalli (1850–1914), Italian seismologist Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
Mercalli scale (mɜːˈkælɪ)
Compare Richter scale See also intensity a 12-point scale for expressing the intensity of an earthquake, ranging from 1 (not felt, except by few under favourable circumstances) to 12 (total destruction)
[C20: named after Giuseppe Mercalli (1850--1914), Italian volcanologist and seismologist]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

Mercalli scale
named for It. geologist Giuseppe Mercalli (1850-1914), who invented it.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
Mercalli scale   (mər-kä'lē, měr-)  Pronunciation Key 
A scale of earthquake intensity based on observed effects and ranging from I (detectable only with instruments) to XII (causing almost total destruction). It is named after the Italian seismologist Giuseppe Mercalli.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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