epicenter

[ep-uh-sen-ter]
noun
1.
Also, epicentrum. Geology. a point, directly above the true center of disturbance, from which the shock waves of an earthquake apparently radiate.
2.
a focal point, as of activity: Manhattan's Chinatown is the epicenter of the city's Chinese community.
Also, especially British, epicentre.


Origin:
1885–90; < Neo-Latin epicentrum < Greek epíkentros on the center. See epi-, center

epicentral, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
epicentre or epicenter (ˈɛpɪˌsɛntə)
 
n
1.  Compare focus the point on the earth's surface directly above the focus of an earthquake or underground nuclear explosion
2.  informal the absolute centre of something: the epicentre of world sprinting
 
[C19: from New Latin epicentrum, from Greek epikentros over the centre, from epi- + kentron needle; see centre]
 
epicenter or epicenter
 
n
 
[C19: from New Latin epicentrum, from Greek epikentros over the centre, from epi- + kentron needle; see centre]
 
epi'central or epicenter
 
adj

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

epicenter
1887, from Mod.L. epicentrum (1879 in geological use); see epi- + center.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
epicenter   (ěp'ĭ-sěn'tər)  Pronunciation Key 
The point on the Earth's surface that is directly above the focus (the point of origin) of an earthquake. The epicenter is usually the location where the greatest damage associated with an earthquake occurs. See Note at earthquake.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The deeper the epicenter under the seabed, the less potential there is for a
  tsunami.
Ask students if they were able to determine the earthquake's epicenter.
One of them may be a tendency to view ourselves as the epicenter of all human
  events.
Naturally, having your town go from rural crossroads to epicurean epicenter has
  brought some stresses.
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