mag·ne·to·hy·dro·dy·nam·ics

[mag-nee-toh-hahy-droh-dahy-nam-iks]
noun ( used with a singular verb )
the branch of physics that deals with the motion of electrically conductive fluids, especially plasmas, in magnetic fields. Abbreviation: MHD


Origin:
1945–50; magneto- + hydrodynamics

mag·ne·to·hy·dro·dy·nam·ic, adjective
mag·ne·to·hy·dro·dy·nam·i·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
magnetohydrodynamics (mæɡˌniːtəʊˌhaɪdrəʊdaɪˈnæmɪks) [Click for IPA pronunciation guide]
 
n
1.  the study of the behaviour of conducting fluids, such as liquid metals or plasmas, in magnetic fields
2.  the generation of electricity by subjecting a plasma to a magnetic field and collecting the deflected free electrons
 
magnetohydrody'namic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Magnetohydrodynamics has a plethora of syllables.
So is floccinaucinihilipilification. Does it mean:
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
Encyclopedia Britannica
Encyclopedia

magnetohydrodynamics

the description of the behaviour of a plasma (q.v.), or, in general, any electrically conducting fluid in the presence of electric and magnetic fields.

Learn more about magnetohydrodynamics with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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