: a compound formed by the union of two radicals or two molecules of a simpler compound
specifically : a polymer formed from two molecules of a monomer

Examples of dimer in a Sentence

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The moonlight form of the protein can be created only from the darkness dimer — not from the free-floating sunlight form. Elise Cutts, Quanta Magazine, 19 Dec. 2023 Cosmetic chemist Laura Lam-Phaure attributes the natural finish to dimer dilinoleyl dimer dilinoleate (say that just one time fast). Kara McGrath, Allure, 13 Oct. 2023

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1926, in the meaning defined above

Time Traveler
The first known use of dimer was circa 1926

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Cite this Entry

“Dimer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dimer. Accessed 24 Mar. 2025.

Medical Definition

: a compound formed by the union of two radicals or two molecules of a simpler compound
specifically : a polymer formed from two molecules of a monomer
dimerization noun
dimerize transitive verb
dimerized or British dimerised; dimerizing or British dimerising

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