Look up dy or d.y. in Wiktionary, the free dictionary.

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

Science and technology

• dy, Leibniz's notation for the differential of a variable y
• Dysprosium (symbol Dy), a chemical element
• 1,4-Dioxane, a solvent

Astronomy

• DY Persei, a variable star in the Perseus constellation
• DY Persei variable, a subclass of R Coronae Borealis variables
• DY Eridani, a triple star system less than 16.5 light years away from Earth

Businesses

• Norwegian Air Shuttle (IATA code: DY)
• Alyemda (former IATA code: DY), a former Yemeni airline
• DY, clothing brand of singer Daddy Yankee

People

• Dy (surname), a surname in various cultures (including a list of people with the surname)
• DY (rapper) (born 1984), Canadian rapper
• DY, member of the American record production and songwriting team 808 Mafia
• Lady Di, Diana, Princess of Wales

Places

• DY, the official International vehicle registration code for Benin (formerly Dahomey)
• DY postcode area, in England
• DY Patil Stadium, a cricket stadium in India
• D. Y. Patil college of Engineering and Technology, Kolhapur, in India

Other uses

• dy (digraph), 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

See also

• Dee Why, a suburb in Sydney, Australia
• Die (disambiguation)
• Dye (disambiguation)
• YD (disambiguation)

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