ZZ or zz may refer to:

Businesses and organisations

Zhongzhi Capital Zhongzhi Capital (abbreviated as ZZ Capital) is a Chinese asset management company which is headquartered in Beijing. The company was founded in 2011 with registered capital of RMB 1bn. It is registered with the Asset Management Association of Ch ...

or ZZ Capital, an asset management company *

Živi zid The Key of Croatia () was a populist List of political parties in Croatia, political party in Croatia. Until the party changed its name on 21 May 2022, it was known as Human Shield (, ) and was formed out of an anti-eviction group of the same n ...

("Human Shield"), a Croatian political party

Games and sport

ZZ Leiden ZZ Leiden Basketball, also known as Zorg en Zekerheid Leiden, is a professional basketball club based in Leiden, Netherlands. The club plays in the BNXT League, the domestic first tier league. Their home games are played at Sportcomplex 1574. Z ...

, a Dutch basketball club * ZZ method, in speedcubing * ZZ scale, of model rail

Music

* ZZ (band), a Japanese rock band *

Z. Z. Hill Arzell J. "Z. Z." Hill (September 30, 1935 – April 27, 1984)Dahl, Bill. "Z.Z. Hill" Allmusic.com. Retrieved 29 March 2014. was an American blues singer best known for his recordings in the 1970s and early 1980s, including his 1982 album for Ma ...

(1935–1984), American blues singer *

ZZ Top ZZ Top is an American rock band formed in Houston, Texas, in 1969. For almost 56 years, it consisted of vocalist-guitarist Billy Gibbons, drummer Frank Beard (musician), Frank Beard, and bassist-vocalist Dusty Hill prior to his death in 2021. ZZ ...

, an American rock band *

ZZ Ward Zsuzsanna Eva Ward (born June 2, 1986) is an American singer-songwriter from Roseburg, Oregon. She signed with Hollywood Records to release her debut extended play (EP), ''Criminal'' (2012), which preceded the release of her debut studio album, ...

(born 1986), American blues rock singer * "Zz", a silent track on the 2014 album ''

Sleepify ''Sleepify'' is an album by the American funk band Vulfpeck, released March 2014. The release consists solely of ten roughly 30-second-long tracks of silence. The album was made available on the music streaming service Spotify, where the band enc ...

'' by Vulfpeck

Science and mathematics

Astronomy

ZZ Boötis ZZ Boötis is a star system in the constellation Boötes. It varies from magnitude 6.79 to 7.44 over five days. Based on its parallax, measured by the ''Gaia'' spacecraft, it is about away. Observational history In 1950 Grigory Shajn ...

, a star system in the constellation Boötes * ZZ Ceti, a type of pulsating white dwarf star *

G 29-38 Giclas 29-38 is a white dwarf in the constellation Pisces. A variable star, it bears the variable-star designation ZZ Piscium, and makes part of the DAV (or ZZ Ceti) variable type. Such stars display variability due to large-amplitude, n ...

or ZZ Piscium, a variable white dwarf star

Molecular biology

ZZ zinc finger In molecular biology the ZZ-type zinc finger domain is a type of protein domain that was named because of its ability to bind two zinc ions. These domains contain 4-6 Cys residues that participate in zinc binding (plus additional Ser/His residue ...

, a type of protein domain * ZZ, homogametic males under the

ZW sex-determination system The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds, some fish and crustaceans such as the giant river prawn, some insects (including butterflies and moths), the schistosome family of flatwor ...

* ZZ, homogametic males under the

ZO sex-determination system The ZO sex-determination system is a system that determines the sex of offspring in caddisflies and several moths. In those species, there is one sex chromosome, Z. Males have two Z chromosomes, whereas females have one Z. Males are ZZ, while fe ...

Other uses in science and mathematics

Zamioculcas ''Zamioculcas'' is a genus of flowering plants in the family Araceae, containing the single species ''Zamioculcas zamiifolia.'' It is a tropical Herbaceous plant, herbaceous perennial plant, and is native to eastern Africa, including Kenya, KwaZu ...

(or ''ZZ plant''), a flowering plant genus *

ZZ diboson ZZ dibosons are rare pairs of Z bosons. They were first observed by the experiments at the Large Electron–Positron Collider (ALEPH, DELPHI, L3 and OPAL). The first observation in a hadron collider was made by the scientists of DØ collaborati ...

, in particle physics *

\mathbb

, the Zahlen symbol for the set of

integer An integer is the number zero (0), a positive natural number (1, 2, 3, ...), or the negation of a positive natural number (−1, −2, −3, ...). The negations or additive inverses of the positive natural numbers are referred to as negative in ...

Vehicles

Isuzu Gemini ZZ/R The Isuzu Gemini is a subcompact car produced by the Japanese automaker Isuzu from 1974 until 2000. The same basic product was built and/or sold under several other names, sometimes by other General Motors brands, in various markets around the wor ...

, a subcompact car *

Tommykaira ZZ The Tommykaira ZZ is a Mid-engine design, mid-engined sports car manufactured by Japanese tuning company Tommykaira. The car was conceived in late 1991, developed from 1992, unveiled in 1995, and manufactured from 1996 to 2000 in its first generatio ...

, a mid-engined sports car *

Toyota ZZ engine The Toyota ZZ engine family is a straight-4 piston engine series. The ZZ series uses a die-cast aluminium engine block with thin press-fit cast iron cylinder liners, aluminium DOHC 4-valve cylinder heads, and chain-driven camshafts. The ZZ fa ...

, a straight-4 piston engine series *

Kawasaki ZZ-R1200 The ZZ-R1200 or ZX-12C, is a sport touring motorcycle made by Kawasaki motorcycles, Kawasaki from (2002–2005). Identified by its model number ZX1200-C1, it is the successor to the Kawaski ZX-11, ZX-11(1990–2001). Considered a Sport touring mo ...

, a motorcycle

Other uses

Zz (digraph) This is a list of digraphs used in various Latin alphabets. In the list, letters with diacritics are arranged in alphabetical order according to their base, e.g. is alphabetised with , not at the end of the alphabet, as it would be in Danish, ...

, in the Latin alphabet *

ZZ Packer Zuwena "ZZ" Packer (born January 12, 1973) is an American writer, primarily of works of short fiction. She is the recipient of a Rona Jaffe Foundation Writer’s Award, a Whiting Award and a Guggenheim Fellowship. Her book ''Drinking Coffee El ...

(born 1973), American writer * ''

The War Games ''The War Games'' is the seventh and final serial of the sixth season of the British science fiction television series ''Doctor Who'', which originally aired in ten weekly parts from 19 April to 21 June 1969. In the serial, an unnamed alien r ...

'', a 1969 ''Doctor Who'' serial (production code: ''ZZ'')