ZZ

ZZ or zz may refer to:

Music

• ZZ (band), a Japanese rock band
• ZZ Top, an American rock band
• "Zz", a silent track on the 2014 album Sleepify by Vulfpeck

People

• Z. Z. Hill (1935–1984), an American blues singer
• ZZ Packer (born 1973), an American writer
• ZZ Ward, Zsuzsanna Eva Ward (born 1986), an American musician

Science and mathematics

Astronomy

• ZZ Boötis, a star system in the constellation Boötes
• ZZ diboson, a pair of Z bosons
• ZZ Ceti, a type of pulsating white dwarf star
• G 29-38 or ZZ Piscium, a variable white dwarf star

Molecular biology

• ZZ zinc finger, a type of protein domain
• ZZ, homogametic males under the ZW sex-determination system
• ZZ, homogametic males under the ZO sex-determination system

Other uses in science and mathematics

• Zamioculcas or ZZ plant, a genus of flowering plant in the family Araceae
• $\mathbb {Z}$, the Zahlen symbol, representing the set of integers

Vehicles

• Isuzu Gemini ZZ/R, a subcompact car
• Tommykaira ZZ, a mid-engined sports car
• Toyota ZZ engine, a straight-4 piston engine series
• Kawasaki ZZ-R1200, a motorcycle

Other uses

• ZZ Leiden, a basketball club based in Leiden, Netherlands
• ZZ scale, a 1:300 model railroad scale
• Živi zid ("Human Shield"), a political party in Croatia
• Zhongzhi Capital or ZZ Capital, an asset management company
• ZZ method, in speedcubing
• ZZ, the production code for the 1969 Doctor Who serial The War Games
• Zz (digraph), a digraph in the Latin alphabet

See also

• Sleep (disambiguation)
• Z (disambiguation)
• Zzz (disambiguation)
• Zzzz (disambiguation)
• ZZR (disambiguation)