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tautomer

[ taw-tuh-mer ]

noun

, Chemistry.
  1. a compound that exhibits tautomerism.


tautomer

/ ˈtɔːtəmə /

noun

  1. either of the two forms of a chemical compound that exhibits tautomerism
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of tautomer1

First recorded in 1900–05; back formation from tautomerism
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Example Sentences

This hypothesis, called the tautomer hypothesis, says the standard four nucleotides can form mismatched pairs due to tautomerization, or the tendency of nucleotides to oscillate between several structural variants with the same composition.

Such an altered base pair, known as a tautomer, can quickly jump back to its original arrangement.

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tautologytautomerism