| 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. |
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.
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