: 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
Recent Examples on the Web
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 veteran dimer is this franchise’s all-time leader in minutes, shots, assists and steals.
—Steven Louis Goldstein, New York Times, 17 May 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
In the early 1990s, Van Beek helped develop the D-dimer blood test that’s used around the world to monitor clot formation in patients, including those with Covid-19, and to dose them with heparin and other anticoagulant medications.
—Jason Gale, Fortune, 5 May 2020
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Atharva Gosavi, Interesting Engineering, 12 Aug. 2025
The veteran dimer is this franchise’s all-time leader in minutes, shots, assists and steals.
—Steven Louis Goldstein, New York Times, 17 May 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
In the early 1990s, Van Beek helped develop the D-dimer blood test that’s used around the world to monitor clot formation in patients, including those with Covid-19, and to dose them with heparin and other anticoagulant medications.
—Jason Gale, Fortune, 5 May 2020
Cite this Entry
“Dimer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dimer. Accessed 25 Oct. 2025.
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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