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isopycnic

[ahy-suh-pik-nik] /ˌaɪ səˈpɪk nɪk/
adjective
1.
Also, isopycnal
[ahy-suh-pik-nl] /ˌaɪ səˈpɪk nl/ (Show IPA)
. having the same density.
noun
2.
a line drawn on a map connecting all points having the same density, as of water or air.
Origin
1885-1890
1885-90; iso- + pycnic, variant of pyknic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for isopycnal

isopycnal

/ˌaɪsəʊˈpɪknəl/
noun
1.
a line on a map connecting points of equal atmospheric density
Word Origin
C19: from iso- + Greek puknos thick
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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