tur·bu·lence

[tur-byuh-luhns]
noun
1.
the quality or state of being turbulent; violent disorder or commotion.
2.
Hydraulics. the haphazard secondary motion caused by eddies within a moving fluid.
3.
Meteorology. irregular motion of the atmosphere, as that indicated by gusts and lulls in the wind.
Also, tur·bu·len·cy.


Origin:
1590–1600; < Late Latin turbulentia. See turbulent, -ence

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
turbulence or (rarely) turbulency (ˈtɜːbjʊləns, ˈtɜːbjʊˌlənsɪ) [Click for IPA pronunciation guide]
 
n
1.  a state or condition of confusion, movement, or agitation; disorder
2.  meteorol local instability in the atmosphere, oceans, or rivers
3.  turbulent flow in a liquid or gas
 
turbulency or (rarely) turbulency
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Turbulence is always a great word to know.
So is bezoar. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
American Heritage
Science Dictionary
turbulence   (tûr'byə-ləns)  Pronunciation Key 
Chaotic or unstable eddying motion in a fluid. Avoiding excessive turbulence generated around moving objects (such as airplanes), which can make their motion inefficient and difficult to control, is a major factor in aerodynamic design.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The limiting factor is spacing arrivals is wake turbulence.
Although turbulence is scary, it's rarely dangerous.
As it rises, the moisture condenses to form clouds, which are jostled by
  internal turbulence.
Look more closely, and you see three weather systems where turbulence and
  storms are possible.
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