DY, D. Y., Dy, or dy may refer to:

In science and technology, and mathematics

Astronomy

DY Persei DY Persei is a variable star and carbon star in the Perseus constellation. At maximum it is 11th magnitude and at its faintest it drops to 16th magnitude. DY Persei is the prototype of the very rare DY Persei class of variables that p ...

, a variable star in the Perseus constellation *

DY Persei variable DY Persei variables are a subclass of R Coronae Borealis (R CrB) variables. They are carbon-rich asymptotic giant branch (AGB) stars that exhibit pulsational variability of AGB stars and irregular fades similar to R CrB stars. The star DY Per ...

, a subclass of R Coronae Borealis variables *

DY Eridani 40 Eridani is a triple star system in the constellation of Eridanus, abbreviated 40 Eri. It has the Bayer designation Omicron2 Eridani, which is Latinized from ο2 Eridani and abbreviated Omicron2 Eri or ο2 Eri. Based on paral ...

, a triple star system less than 16.5 light years away from Earth

Other sciences

* , in calculus, Leibniz's notation for the differential of a variable ''y'' *

Dysprosium Dysprosium is the chemical element with the symbol Dy and atomic number 66. It is a rare-earth element in the lanthanide series with a metallic silver luster. Dysprosium is never found in nature as a free element, though, like other lanthanides, it ...

, symbol Dy, a chemical element *

1,4-Dioxane 1,4-Dioxane () is a heterocyclic organic compound, classified as an ether. It is a colorless liquid with a faint sweet odor similar to that of diethyl ether. The compound is often called simply dioxane because the other dioxane isomers ( 1,2- ...

, a common solvent

Businesses

* Norwegian Air Shuttle (IATA code DY) * Alyemda, a Yemeni airline (IATA code DY, until 1993) * DY, clothing brand of singer Daddy Yankee

People

Dy (surname) Dy is a surname in Cambodia and the Philippines. Origins As an English surname, Dy is a variant spelling of Dye, which may have come from the Greek masculine given name Dionysios or its feminine form Dionysia. One early record of the surname ...

, a surname in various cultures (including a list of people with the surname) *

DY (rapper) Forrest Schab, known by his stage name DY (born 1984), was a Canadian rapper raised in Vancouver, British Columbia. In 2009, he signed to CP Records. Biography His stage name is an acronym deriving from his nickname ''Die Young''. DY started maki ...

(born 1984), Canadian rapper * DY, member of the American record production and songwriting team 808 Mafia * Lady Di,

Diana, Princess of Wales Diana, Princess of Wales (born Diana Frances Spencer; 1 July 1961 – 31 August 1997) was a member of the British royal family. She was the first wife of King Charles III (then Prince of Wales) and mother of Princes William and Harry. Her ac ...

Places

* DY, the official

International vehicle registration code The country in which a motor vehicle's vehicle registration plate was issued may be indicated by an international licence plate country code, formerly known as an International Registration Letter or International Circulation Mark. It is ref ...

for Benin (formerly Dahomey) *

DY postcode area The DY postcode area, also known as the Dudley postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of fourteen postcode districts in England, within eight post towns. These cover the south-western part of the West Midlands ...

in Britain *

DY Patil Stadium The DY Patil Stadium, also known as DY Patil Sports Stadium, is a multi-purpose stadium at D. Y. Patil campus at Nerul in Mumbai, Maharashtra, India. It was designed by Hafeez Contractor. It is a privately owned ground and is the home of D.Y. ...

, a cricket stadium in India * D. Y. Patil college of Engineering and Technology, Kolhapur in India *

Dee Why Dee Why is a coastal suburb of northern Sydney, in the state of New South Wales, Australia, 18 kilometres north-east of the Sydney central business district. It is the administrative centre of the local government area of Northern Be ...

, a suburb in Sydney, Australia

Other uses

dy (digraph) This is a list of digraphs used in various Latin alphabets. Capitalisation involves only the first letter (''ch'' becomes ''Ch'') unless otherwise stated (''ij'' becomes ''IJ''). Letters with diacritics are arranged in alphabetic order accordin ...

, a digraph used in rendering the Xhosa and Shona languages, as well as some Australian Aboriginal languages such as Warlpiri * Deputy (disambiguation) * DY, a line of clothing from Puerto Rican singer Daddy Yankee