Xo or XO may refer to:
Arts, media, and entertainment
Super Robot Wars XO, a 2006 tactical role-playing video game XO Group, a media company X-O Manowar, a Valiant Comics superhero Xiomara "Xo" Villanueva, a character on Jane the Virgin, an American satirical telenovela
Music
XO (group), British girl group XO (record label), founded by the Weeknd Miami XO, American rapper XO (Elliott Smith album), 1998 XO (Leathermouth album), 2009
Songs "XO" (song), 2013, by Beyoncé from her self-titled studio album "XO", 2005, by Fall Out Boy from the album From Under the Cork Tree "XO", 2010, by Mike Posner from the album 31 Minutes to Takeoff "XO", 2015, by The Eden Project "XO", 2022, by girl group Citizen Queen "Xo", 2022, by Stand Atlantic from the album F.E.A.R. "XO (Only If You Say Yes)", by K-pop boy group Enhypen "X.O.", 1996, by Luniz from the film soundtrack Original Gangstas "XO / The Host", 2011, by the Weeknd from his third mixtape Echoes of Silence
Food and drink XO sauce, a spicy seafood-based dressing sauce XO (extra old), a grade of cognac liquor
Science and technology
XO Telescope or its exo-planet survey Xylenol orange, a chemical indicator for metal ions, used in titrations
Computing and electronics OLPC XO, a laptop produced by the One Laptop per Child association XO Communications, a telecom company Crystal oscillator (deprecated abbreviation: XO), an electronic circuit
Biology XO sex determination system, a chromosomal system used to designate sex of some species of insects, arachnids, and mammals XO, heterogametic male designation under this system Turner syndrome, a genetic condition in which one of the sex chromosomes is absent Xanthine oxidase, an enzyme that catalyzes the oxidation of hypoxanthine to xanthine
Other uses Executive officer or XO, as in a military or police force Hugs and kisses or XO LTE International Airways's IATA airline code
See also Chi Omega ("ΧΩ"), a National Panhellenic Conference women's fraternity Executive order (disambiguation), an edict by a member of the executive branch of a government Exo (disambiguation), multiple terms OX (disambiguation) Tic-tac-toe, a game using X's and O's X's and O's (disambiguation) Xbox One (XBO), a video game console by Microsoft XOXO (disambiguation)