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isosteric

[ahy-suh-ster-ik] /ˌaɪ səˈstɛr ɪk/
adjective
1.
Chemistry. having the same number of valence electrons in the same configuration but differing in the kinds and numbers of atoms.
2.
Meteorology. having or showing equal atmospheric density.
Origin
1860-1865
1860-65; iso- + Greek ster(eós) solid, hard + -ic
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for isosteric

isosteric

/ˌaɪsəʊˈstɛrɪk/
adjective
1.
(of two different molecules) having the same number of atoms and the same number and configuration of valency electrons, as carbon dioxide and nitrous oxide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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