isotach

i·so·tach

[ahy-suh-tak]
noun Meteorology.
a line on a weather map or chart connecting points where winds of equal speeds have been recorded.

Origin:
1945–50; iso- + -tach < Greek tachýs swift; see tachy-

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
isotach (ˈaɪsəʊˌtæk) [Click for IPA pronunciation guide]
 
n
a line on a map connecting points of equal wind speed
 
[from iso- + Greek takhos speed]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Isotach is always a great word to know.
So is flibbertigibbet. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a chattering or flighty, light-headed person.
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