Definition of doublet in English:


Line breaks: doub|let
Pronunciation: /ˈdʌblɪt


  • 1A pair of similar things, in particular two words of the same derivation but having different meanings, for example fashion and faction, cloak and clock.
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    • Carroll called the given words doublets, the interposed words links, and the complete series a chain.
    • For those not etymologically challenged, the word canker is a doublet.
    • Etymologically speaking, a doublet is a pair of words that have the same origin but different spellings and often different meanings.
  • 1.1 (doublets) The same number on two dice thrown at once.
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    • If doublets are thrown (e.g. two sixes), four moves of that number (e.g. four moves of six points) may be made, either all by one White man or separately Backgammon Board.
  • 1.2 Physics & Chemistry A pair of associated lines close together in a spectrum or electrophoretic gel.
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    • These studies have led to the findings that bundles of several doublet microtubules can propagate bending waves, and a pair of outer doublets can undergo cyclical association/dissociation interaction.
    • Whereas the effect of the redshift is to multiply the wavelength of every line in the spectrum by the name number, 1 + z, any variation in only changes the relative separation between the lines in the doublet.
    • The mechanism by which the oscillatory movements produced by these two opposing pairs of doublets are coupled with each other remains to be elucidated.
  • 1.3A combination of two simple lenses.
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    • The original lens cell is an air spaced semi-apochromatic doublet, which uses three adjustment screws to collimate the lenses in the machined aluminum cell.
  • 2A man’s short close-fitting padded jacket, commonly worn from the 14th to the 17th century: they were wearing red velvet doublets and hose
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    • Indicators of this are the short doublet and very prominent codpiece, the round-toed shoes and the knee-breeches.
    • It represents a bagpiper wearing a short doublet, full, knee-length breeches with a prominent codpiece, shoes with narrow rounded toes, and a hemispherical, skullcap-like hat with a very narrow brim.
    • The minstrels, bedecked in red doublets and white hose, played upbeat tunes to which gardens of brightly clad nobles danced merrily.


Middle English: from Old French, 'something folded', also denoting a fur-lined coat, from double 'double'.

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