ZZ or zz may refer to:

Music

ZZ (band) ZZ is a Japanese band. Members * Sotaro (vocals) * Erichi (keyboards) * Matsuura (drums) * Kohsuke (guitarist) * Kyama (bassist) * Rey (Guitarist) Discography Albums * ''Definitive Energy Flow'' (2003) * ''Universal ZZ'' (2004) * ''A to Z ...

, a Japanese rock band *

ZZ Top ZZ Top is an American rock band formed in 1969 in Houston, Texas. For 51 years, they comprised vocalist-guitarist Billy Gibbons, drummer Frank Beard and vocalist-bassist Dusty Hill, until Hill's death in 2021. ZZ Top developed a signature sound ...

, an American rock band * "Zz", a silent track on the 2014 album ''

Sleepify ''Sleepify'' is an album by American funk band Vulfpeck. The release does not contain any audible sound, instead, it consists solely of ten roughly 30-second-long tracks of silence. The album was made available on the music streaming service Spoti ...

'' by Vulfpeck

People

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

(1935–1984), an American blues singer *

ZZ Packer Zuwena "ZZ" Packer (b. January 12, 1973) is an American writer. She is primarily known for her works of short fiction. Early life and education Born in Chicago, Illinois, Packer grew up in Atlanta, Georgia, and Louisville, Kentucky. "ZZ" was a ...

(born 1973), an American writer *

ZZ Ward Zsuzsanna Eva Ward (born June 2, 1986) known professionally as ZZ Ward, is an American singer-songwriter. Ward released her debut EP, ''Criminal'', on May 8, 2012. Her debut album, '' Til the Casket Drops'', was released on October 16, 2012. "P ...

, Zsuzsanna Eva Ward (born 1986), an American musician

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 d ...

, a star system in the constellation Boötes *

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 ...

, a pair of Z bosons * ZZ Ceti, a type of pulsating white dwarf star *

G 29-38 Giclas 29-38, also known as ZZ Piscium, is a variable star, variable white dwarf star of the Pulsating white dwarf, DAV (or ZZ Ceti) type, whose variability is due to amplitude, large-amplitude, non-radial pulsations known as gravity wave ...

or ZZ Piscium, a variable white dwarf star

Other uses in science and mathematics

* ZZ zinc finger, a type of protein domain *

\mathbb

, the Zahlen symbol, representing the set of

integer An integer is the number zero (), a positive natural number (, , , etc.) or a negative integer with a minus sign (−1, −2, −3, etc.). The negative numbers are the additive inverses of the corresponding positive numbers. In the language ...

s *

Zamioculcas ''Zamioculcas'' is a genus of flowering plants in the family Araceae, containing the single species ''Zamioculcas zamiifolia''. It is a tropical perennial plant, native to eastern Africa, from southern Kenya to northeastern South Africa. Common ...

or ZZ plant, a genus of flowering plant in the family Araceae * 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 flatworms, ...

* ZZ, homogametic males under the

ZO sex-determination system The ZO sex-determination system is a system that determines the sex of offspring in 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 females are ZO. S ...

Transportation

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 wo ...

, a subcompact car *

Tommykaira ZZ The Tommykaira ZZ is a mid-engined sports car manufactured by tuning company Tommykaira (トミーカイラ) in Japan. The car was conceived in late 1991, developed from 1992, unveiled in 1995 and manufactured from 1996 to 2000 in its first generati ...

, 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, and aluminium DOHC 4-valve cylinder heads. The camshafts are chain-driven. The t ...

, a straight-4 piston engine series *

Kawasaki ZZ-R1200 The ZZ-R1200 or ZX-12C, is a sport bike made by Kawasaki from (2002-2005). Identified by its model number ZX1200-C1, it is the successor to the ZX-11(1990-2001). Considered a sport tourer, it had a twin-spar aluminum frame and a liquid-cooled, ...

, a motorcycle

Other uses

ZZ Leiden ZZ Leiden Basketball, also known as Zorg en Zekerheid Leiden, is a basketball club based in Leiden, Netherlands. The club plays in the BNXT League, the domestic first tier league. Their home games are played at Vijf Meihal, which has 2,000 seats. ...

, a basketball club based in Leiden, Netherlands *

ZZ scale ZZ scale (1:300) is a model railroad scale with a standard gauge of . Models for the scale are produced exclusively by Bandai, and depict Japanese prototypes such as Shinkansen trains. To date, no other traditional scale railway support exists f ...

, a 1:300 model railroad scale *

Živi zid The Key of Croatia ( hr, Ključ Hrvatske) is a populist political party in Croatia, formed out of an anti-eviction group of the same name. The party changed its name on 21 May 2022 from its then name Human Shield the group opposes foreclosures by ...

("Human Shield"), a political party in Croatia *

Zhongzhi Capital Zhongzhi Capital (abbreviated as ZZ Capital) was founded in 2011 with registered capital of RMB 1bn, it is an asset management company which is headquartered in Beijing. It is registered with the Asset Management Association of China. History ...

or ZZ Capital, an asset management company * ZZ method, in speedcubing * ZZ, the production code for the 1969 ''Doctor Who'' serial ''

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 ...