[ ep-uh-mer ]
/ ˈɛp ə mər /

noun Chemistry.

either of a pair of isomeric aldose compounds, especially of certain sugars, that differ from each other in the positions of the H and OH at the second atom from the end of the carbon chain, as d-glucose and d-mannose.

Nearby words

  1. epilogue,
  2. epimandibular,
  3. epimedium,
  4. epimenorrhagia,
  5. epimenorrhea,
  6. epimerase,
  7. epimere,
  8. epimerism,
  9. epimerize,
  10. epimorphism

Also e·pim·er·ide [uh-pim-uh-rahyd] /əˈpɪm əˌraɪd/.

Origin of epimer

First recorded in 1910–15; epi- + -mer

Related formsep·i·mer·ic [ep-uh-mer-ik] /ˌɛp əˈmɛr ɪk/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for epimer


[ ĕpə-mər ]


One of two molecules that differ only in the spatial arrangement around a single carbon atom.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.