: 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
di·mer·i·za·tion
ˌdīmərə̇ˈzāshən 
plural -s
: the process of dimerizing or the state of being dimerized
Examples of dimer in a Sentence
Recent Examples on the Web
Sandee Lamotte, CNN Money, 18 May 2026
Many partner up as dimers or join even larger complexes.
—William A. Haseltine, Forbes.com, 20 Jan. 2026
With Kittle on ice, Purdy can turn to electric gadget Jauan Jennings (what a dimer) or the physical Demarcus Robinson (111 yards and a TD in the wild-card round).
—Steven Louis Goldstein, New York Times, 17 Jan. 2026
Computer simulations showed that these extra ions form pairs of atoms called (Nb/Mo)₂O₉ dimers inside the crystal.
—Atharva Gosavi, Interesting Engineering, 12 Aug. 2025
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
In this study, business class did not differ significantly from economy class for development of an elevated D-dimer.
—Dr. Keith Roach, oregonlive, 20 July 2021
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Noun
Those chemicals include perfluorononanoate (PFNA), perfluorohexanesulfonic acid (PFHxS) and hexafluoropropylene oxide dimer acid (HFPO-DA), the last one often referred to as a GenX chemical.
—Sandee Lamotte, CNN Money, 18 May 2026
Many partner up as dimers or join even larger complexes.
—William A. Haseltine, Forbes.com, 20 Jan. 2026
With Kittle on ice, Purdy can turn to electric gadget Jauan Jennings (what a dimer) or the physical Demarcus Robinson (111 yards and a TD in the wild-card round).
—Steven Louis Goldstein, New York Times, 17 Jan. 2026
Computer simulations showed that these extra ions form pairs of atoms called (Nb/Mo)₂O₉ dimers inside the crystal.
—Atharva Gosavi, Interesting Engineering, 12 Aug. 2025
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
In this study, business class did not differ significantly from economy class for development of an elevated D-dimer.
—Dr. Keith Roach, oregonlive, 20 July 2021
Cite this Entry
“Dimer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dimer. Accessed 19 Jun. 2026.
Copy CitationMedical Definition
dimer
noun
di·mer
ˈdī-mər
: 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
dimerize
transitive verb
or British dimerise
dimerized or British dimerised; dimerizing or British dimerising
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