Doublet is a word derived from the Latin ''duplus'', "twofold, twice as much", and is used to indicate a pair of identical, similar, or related things. Doublet may refer to:

Apparel

Doublet (clothing) A doublet (/ˈdʌblɪt/; derived from the Ital. ''giubbetta'') is a man's snug-fitting jacket that is shaped and fitted to the man's body. The garment was worn in Spain, and spread to the rest of Western Europe, from the late Middle Ages up to ...

, a man's snug-fitting buttoned jacket that was worn from the late 14th century to the mid 17th century *

Doublet (Highland dress) Doublet is the term describing any of several types of jacket worn with Scottish highland dress; referring to both uniform and evening jackets. Uniform doublets are found in a number of different styles. Commonly they are short cut with four I ...

, a formal jacket worn with Scottish highland dress

Games

* Doublet (dominoes), a domino tile in which both ends have the same value *

Doublets (game) Doublets or queen's game is an historical English tables game for two people which was popular in the 17th and 18th centuries. Although played on a board similar to that now used for backgammon, it is a simple game of hazard bearing little resemb ...

, old English tables game in the same family as Backgammon *

Word ladder Word ladder (also known as Doublets, word-links, change-the-word puzzles, paragrams, laddergrams, or word golf) is a word game invented by Lewis Carroll. A word ladder puzzle begins with two words, and to solve the puzzle one must find a chain of o ...

or "doublets", a word game invented by Lewis Carroll

Science and technology

Doublet (computing) In computing and telecommunications, a unit of information is the capacity of some standard data storage system or communication channel, used to measure the capacities of other systems and channels. In information theory, units of information a ...

, a group of 16 bits in computing *

Doublet (lens) In optics, a doublet is a type of lens made up of two simple lenses paired together. Such an arrangement allows more optical surfaces, thicknesses, and formulations, especially as the space between lenses may be considered an "element". With a ...

, a type of lens, made up of two stacked layers with different refractive indices *

Doublet (linguistics) In etymology, two or more words in the same language are called doublets or etymological twins or twinlings (or possibly triplets, and so forth) when they have different phonological forms but the same etymological root. Often, but not always, th ...

, two or more words of the same language that come from the same root *

Doublet (potential flow) In fluid dynamics, potential flow (or ideal flow) describes the velocity field as the gradient of a scalar function: the velocity potential. As a result, a potential flow is characterized by an irrotational velocity field, which is a valid app ...

, fluid flow due to a source–sink combination *Doublet, or ''

dimeresia ''Dimeresia'' is a monotypic genus in the sunflower family containing the single species ''Dimeresia howellii'', known by the common name doublet. Distribution This uncommon plant is endemic to an area of the Great Basin region in the western U ...

howellii'', a tiny flowering plant *

Doublet earthquake __NOTOC__ In seismology, doublet earthquakes – and more generally, multiplet earthquakes – were originally identified as multiple earthquakes with nearly identical waveforms originating from the same location. They are now characterized as sing ...

, two earthquakes associated by space and time *

Doublet state In quantum mechanics, a doublet is a composite quantum state of a system with an effective spin of 1/2, such that there are two allowed values of the spin component, −1/2 and +1/2. Quantum systems with two possible states are sometimes called tw ...

, a state in quantum physics of a system with a spin of *

Unit doublet In mathematics, the unit doublet is the derivative of the Dirac delta function. It can be used to differentiate signals in electrical engineering: If ''u''1 is the unit doublet, then : (x * u_1)(t) = \frac where * is the convolution In ...

, in mathematics, the derivative of the Dirac delta function

Other uses

Doublet (horse) Doublet (b. 1963 - †.1974) was a Thoroughbred cross gelding. Doublet was a successful performer in the sport of Eventing, in which he was the regular mount of Princess Anne. Doublet was ridden by Princess Anne when winning the gold medal in th ...

, (b. 1963 - †.1974), a thoroughbred gelding *

Doublet (lapidary) A doublet is a type of assembled gem composed in two sections. It is sometimes used to imitate other, more expensive gems. A garnet and glass doublet uses a top portion of natural garnet fused to any color of glass to imitate a gem. The color ...

, an assembled gem composed in two sections, such as a garnet overlaying green glass *Doublet, in

textual criticism Textual criticism is a branch of textual scholarship, philology, and of literary criticism that is concerned with the identification of textual variants, or different versions, of either manuscripts or of printed books. Such texts may range in ...

, two different narrative accounts of the same actual event *

Pierre Jean Louis Ovide Doublet Pierre Jean Louis Ovide Doublet (25 August 1749 - 4 February 1824) was a French politician and writer who spent much of his life serving in the Knights Hospitaller, Knights of Malta. Following his enlistment as a soldier, he entered the service ...

(1749–1824), French politician and writer affiliated with the Order of Malta * Michel Doublet (1939–2022), French politician. {{disambiguation, surname