from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A scale of earthquake intensity based on observed effects and ranging from I (detectable only with instruments) to XII (causing almost total destruction).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a scale formerly used to describe the magnitude of an earthquake; an earthquake detected only by seismographs is a I and an earthquake that destroys all buildings is a XII
After Giuseppi Mercalli (1850-1914), Italian seismologist.(American Heritage® Dictionary of the English Language, Fourth Edition)
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