All articles starting with a number or symbol
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5.56×45mm NATO
5.56×45mm NATO is a rimless, bottlenecked rifle cartridge standardized by NATO in 1980, based on the Belgian FN SS109 bullet, and fired by the M16 rifle and M4 carbine.
5.8S ribosomal RNA
5.8S ribosomal RNA: ~150-160 nt structural RNA of the eukaryotic 60S large subunit, hydrogen-bonded to 28S rRNA, cleaved from the 47S/35S Pol I pre-rRNA between ITS1 and ITS2; distinct from 5S rRNA and homologous to bacterial 23S rRNA's 5' end.
5' Flanking Region
5' flanking region, also called 5' flanking sequence: DNA upstream of a gene's transcription start site, outside the 5' UTR, holding promoters, enhancers, and transcription factor binding sites that regulate transcription.
5'-3' exonuclease
5'-3' exonuclease: nuclease activity digesting nucleic acid from the 5' end in the direction of synthesis; carried by the N-terminal domain of E. coli DNA polymerase I for RNA primer removal and nick translation, homologous to FEN1, and exploited in TaqMan qPCR.
5'-Thymidylic acid
5'-Thymidylic acid, also called thymidine 5'-monophosphate or dTMP, is a deoxyribonucleotide formed from thymine; a fundamental metabolite, it is phosphorylated toward the DNA building block dTTP.
50 (number)
50 (fifty) is the natural number following 49, written L in Roman numerals, the atomic number of tin, and the years in a Golden Jubilee.
50 cc Grand Prix motorcycle racing
50 cc Grand Prix motorcycle racing: FIM ultra-lightweight world championship class, 1962 to 1983, replaced by 80 cc. Tiny two-strokes and four-strokes like Honda's 14 hp, 22,500 rpm RC116 exceeded 109 mph; Suzuki, Kreidler, Derbi and Honda won titles.
50 Cent
50 Cent (Curtis James Jackson III, born 1975) is an American rapper, actor, and entrepreneur from Queens, New York, known for Get Rich or Die Tryin' (2003), surviving nine gunshot wounds in 2000, G-Unit, the Vitaminwater windfall, and the Power TV franchise.
50 Cent albums discography
50 Cent albums discography: five solo studio albums (2003–2014), led by Get Rich or Die Tryin' (872,000 first-week US units) and The Massacre (over 10 million worldwide), plus the shelved Power of the Dollar, the 2005 film soundtrack, and two G-Unit albums.
50 Cent–Ja Rule feud
The 50 Cent–Ja Rule feud, also called the 50 vs. Ja beef, is a hip-hop rivalry begun in 1999 in Queens, involving Murder Inc. versus G-Unit, diss tracks, the 2000 Hit Factory stabbing, and unresolved flare-ups through 2026.
50 Cent: Bulletproof
50 Cent: Bulletproof is a 2005 Mature-rated licensed third-person shooter by Genuine Games and Vivendi Universal Games for PS2 and Xbox, with a PSP G Unit Edition; panned critically (47-52%) yet a million-plus seller.
50 Divisions
The 50 Divisions are the top-level structure of MasterFormat, the standard numbering system for construction specifications, expanded from 16 divisions by CSI and CSC in 2004.
50 First Dates
50 First Dates is a 2004 American romantic comedy starring Adam Sandler and Drew Barrymore, a marine veterinarian courting a woman whose brain injury erases her memory daily.
50 Greatest Players in NBA History
50 Greatest Players in NBA History: honorary 1996 NBA 50th anniversary team chosen by a 50-member panel, announced by David Stern Oct. 29, 1996; all 50 were later named to the 2021 NBA 75th Anniversary Team.
50 Lan (五十岚)
50 Lan (五十岚) is a Taiwanese hand-shaken tea chain founded in 1994 as a roadside stall in Tainan, ranked first in Taiwan bubble-tea market share in 2023.
50 Persei
50 Persei, also cataloged as HD 25998 and V582 Persei, is an F-type main-sequence star in Perseus, about 69 light years from the Sun, that varies as an RS Canum Venaticorum variable.
50 States of Fright
50 States of Fright is a 2020 Quibi horror anthology executive produced by Sam Raimi, telling state-based urban legend stories in sub-10-minute episodes; 24 episodes across two seasons, later a Roku Original from October 2021.
50 Ways to Leave Your Lover
50 Ways to Leave Your Lover, Paul Simon song from Still Crazy After All These Years (1975); December 1975 single with Steve Gadd's drum intro, US Hot 100 No. 1 in 1976 and UK No. 23, names only five exits.
50 YouTubers Fight for $1,000,000
50 YouTubers Fight for $1,000,000 is a July 13, 2024 MrBeast YouTube video in which 50 creators compete inside a glass cube for $1,000,000 for subscribers; Jaiden Animations won the final briefcase bluff.
50–40–90 club
The 50–40–90 club, sometimes called the 180 club, is an unofficial basketball honor for shooting 50% on field goals, 40% on threes, and 90% on free throws.
50/50 (2011 film)
50/50 is a 2011 American comedy-drama film directed by Jonathan Levine, starring Joseph Gordon-Levitt as a 27-year-old given a 50 percent chance of surviving cancer, drawn from writer Will Reiser's own experience.
500 Days of Summer
(500) Days of Summer, 2009 American romantic comedy-drama directed by Marc Webb, written by Scott Neustadter and Michael H. Weber, starring Joseph Gordon-Levitt and Zooey Deschanel; non-linear 500-day breakup story, $60.8M worldwide, Golden Globe-nominated.
500 Days Program
The 500 Days Program (программа «500 дней»), also called the Shatalin–Yavlinsky program, was a 1990 plan to convert the Soviet planned economy into a market economy, never implemented.
500 euro note
The 500 euro note is a euro banknote the European Central Bank stopped issuing in 2019, citing concerns it could facilitate illicit activities; it remains legal tender.
500 home run club
The 500 home run club: 28 MLB players with 500+ career home runs, from Babe Ruth (1929) to Miguel Cabrera (2021); covers records, steroid-era prestige erosion, and Hall of Fame effects.
500 Miles
500 Miles (500 Miles Away from Home, The Railroader's Lament) is a 1961 folk song by Hedy West, rooted in "900 Miles" and "Reuben's Train," popularized by Peter, Paul and Mary in 1962 and distinct from the Proclaimers' 1988 "I'm Gonna Be (500 Miles)."
500 Miles (film)
500 Miles is a 2026 British-Irish road drama directed by Morgan Matthews, adapted from Mark Lowery's Charlie and Me, starring Bill Nighy, Roman Griffin Davis, and Maisie Williams; two brothers flee Yorkshire for their grandfather in Dingle, Ireland.
500 rum
500 rum, also called Rummy 500, 500 Rummy, or Pinochle Rummy, is a rummy card game for 2-8 players who score melded cards, may dig buried discards, and race to 500 points.
500 Selinur
500 Selinur (1903 LA) is a roughly 41 km S-type main-belt asteroid discovered by Max Wolf at Heidelberg on 16 January 1903, named for a Celtic Moon goddess character in Vischer's 1879 novel Auch Einer, with a 4.22-year orbit and 8.01-hour rotation.
500 Series Shinkansen
The 500 Series Shinkansen (新幹線500系) is a Japanese high-speed train built for JR West, first Shinkansen to run at 300 km/h in commercial service, in 1997.