A triplet is a set of three items. It may refer to:

Science

* A series of three nucleotide bases forming an element of the

Genetic code Genetic code is a set of rules used by living cell (biology), cells to Translation (biology), translate information encoded within genetic material (DNA or RNA sequences of nucleotide triplets or codons) into proteins. Translation is accomplished ...

* J-coupling as part of

Nuclear magnetic resonance spectroscopy Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a Spectroscopy, spectroscopic technique based on re-orientation of Atomic nucleus, atomic nuclei with non-zero nuclear sp ...

Opal Opal is a hydrated amorphous form of silicon dioxide, silica (SiO2·''n''H2O); its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to the amorphous (chemical) physical structure, it is classified as a ...

in preparation to be a gemstone * Spin triplet in quantum mechanics, as in triplet oxygen, or

triplet state In quantum mechanics, a triplet state, or spin triplet, is the quantum state of an object such as an electron, atom, or molecule, having a quantum spin ''S'' = 1. It has three allowed values of the spin's projection along a given axis ''m''S = � ...

in general *

Tuple In mathematics, a tuple is a finite sequence or ''ordered list'' of numbers or, more generally, mathematical objects, which are called the ''elements'' of the tuple. An -tuple is a tuple of elements, where is a non-negative integer. There is o ...

of length 3 in mathematics

Technologies

* Photography triplet, or paint triplet *

Triplet lens A triplet lens is a compound lens consisting of three single Lens (optics), lenses. The triplet design is the simplest to give the required number of Degrees of freedom (physics and chemistry), degrees of freedom to allow the lens designer to overc ...

, an optical device consisting of three single lenses *

Tandem bicycle A tandem bicycle or twin is a bicycle (occasionally a tricycle) designed to be ridden by more than one person. The term tandem refers to the seating arrangement (fore to aft, not side by side), not the number of riders. Patents related to ...

, with three seats

Other uses

Triplets A multiple birth is the culmination of a multiple pregnancy, wherein the mother gives birth to two or more babies. A term most applicable to vertebrate species, multiple births occur in most kinds of mammals, with varying frequencies. Such births ...

, the multiple birth of three children *

Triplet Lakes Triplet Lakes is a group of lakes in Clearwater County, Minnesota, in the United States. The group consists of three small lakes, hence the name. See also *List of lakes in Minnesota This is a list of lakes of Minnesota. Although promoted as t ...

, a group of lakes in Minnesota * ''

The Triplets The Triplets (; ) are three fictional characters (Anna, Teresa and Helena) created by Catalan illustrator Roser Capdevila. The Triplets were created in 1983, based on Capdevila's own daughters, three actual triplets born in 1969. The stories we ...

'', a Spanish children's book *

The Triplets (band) The Triplets are a pop rock band that crossed over musical boundaries from the U.S through Latin America. Composed of the triplets Diana, Sylvia, and Vicky Villegas (all born April 18, 1965) of an American mother and a Mexican father, the group ...

, a Latin pop group *

Binghamton Triplets The Binghamton Triplets were a minor league baseball team based in Binghamton, New York between 1923 and 1963. The franchise played as members of the New York–Penn League (1923–1937), Eastern League (1938–1963), New York–Penn League ( ...

, a minor league baseball team * A triplet, a kind of

assembled gem An assembled gem (also called a composite gem) is a gemstone made up of other smaller gems. An assembled gem can often be a fake gem with a desirable piece of gemstone attached to pieces of inexpensive imitation gemstones. For example, a combinati ...

* In music, a

tuplet In music, a tuplet (also irrational rhythm or groupings, artificial division or groupings, abnormal divisions, irregular rhythm, gruppetto, extra-metric groupings, or, rarely, contrametric rhythm) is "any rhythm that involves dividing the beat ...

of three successive notes of equal duration * "The Triplets", Tyler Johnson, Ondrej Palat, and

Nikita Kucherov Nikita Igorevich Kucherov (; born 17 June 1993) is a Russian professional ice hockey right winger and alternate captain for the Tampa Bay Lightning of the National Hockey League (NHL). Regarded as one of the best players in the world, Kucherov ...

of the 2014–15 Tampa Bay Lightning