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isosterism

[ahy-sos-tuh-riz-uh m]
noun
  1. Chemistry. the quality or state of being isosteric.
  2. Pharmacology. the theory that isosteric compounds have identical or similar pharmacological action.
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Origin of isosterism

First recorded in 1860–65; isostere + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018