Also, epicentrum. Geology. a point, directly above the true center of disturbance, from which the shock waves of an earthquake apparently radiate.
a focal point, as of activity: Manhattan's Chinatown is the epicenter of the city's Chinese community.
Also, especially British, epicentre.

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

epicentral, adjective
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World English Dictionary
epicentre or epicenter (ˈɛpɪˌsɛntə)
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
[C19: from New Latin epicentrum, from Greek epikentros over the centre, from epi- + kentron needle; see centre]
epi'central or epicenter

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

1887, from Mod.L. epicentrum (1879 in geological use); see epi- + center.

British spelling of epicenter; for spelling, see -er.
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
Now there are hints of pleasure at the idea that the epicentre of bullishness may be humbled.
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