: a man's close-fitting jacket worn in Europe especially during the Renaissance
2
: something consisting of two identical or similar parts: such as
a
: a lens consisting of two components
especially: a handheld magnifier consisting of two lenses in a metal cylinder
b
: a spectrum line having two close components
c
: a domino with the same number of spots on each end
3
: a set of two identical or similar things: such as
a
: two thrown dice with the same number of spots on the upper face
b
: one of nine pairs of microtubules found in cilia and flagella
4
: one of a pair
specifically: one of two or more words (such as guard and ward) in the same language derived by different routes of transmission from the same source
Illustration of doublet
doublet 1
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Italian scientist Alessandro Volta studied eel physiology to inspire the first battery, and recent work shows eels use doublets, two rapid spikes, to force rapid prey muscle contractions before the knockout blast.—Kaif Shaikh, Interesting Engineering, 17 Oct. 2025 These doublets are separated by an energy, or a frequency, known as the Rabi frequency.—Thomas Linker, The Conversation, 15 Oct. 2025 As a backdrop, doublets of aventurine glass over mother-of-pearl telegraphed the impression of an enchanting event.—Lily Templeton, Footwear News, 5 May 2025 The gemstones come in pink doublet, red doublet, and mother of pearl.—Enjanae' Taylor, Southern Living, 23 Jan. 2024 See All Example Sentences for doublet
Word History
Etymology
Middle English, from Anglo-French dublet, from duble
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