B5, B05, B-5 may refer to:

Biology

  • ATC code B05 (Blood substitutes and perfusion solutions), a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System
  • Cytochrome b<sub>5</sub>, ubiquitous electron transport hemoproteins
  • Cytochrome b5, type A, a human microsomal cytochrome b5
  • HLA-B5, an HLA-B serotype
  • Pantothenic acid (a.k.a. vitamin B<sub>5</sub>), a water-soluble vitamin
  • Procyanidin B5, a B type proanthocyanidin

Entertainment

  • Alekhine's Defence (ECO code B5), a chess opening beginning with the moves e4 Nf6
  • B5 (band), an R&B boy band
  • B5 (album), B5's self-titled debut album
  • Babylon 5, an American science fiction television series
  • The Be Five, a band formed by castmembers of Babylon 5

Transport

  • Amadeus (airline) (IATA code: B5), an airline based in Germany (1996–2004)
  • B5 and B5 DOHC, models of the Mazda B engine series
  • B-5, the manufacturer's model number for the Blackburn Baffin biplane
  • B5 platform, the series designator for Audi A4 from 1994 to 2001
  • Bundesstraße 5, a German federal highway
  • , a Royal Navy B-class submarine
  • Keystone B-5, a light bomber made for the US Army Air Corps in the early 1930s
  • Kinner B-5, a popular five cylinder American radial engine of the 1930s
  • NSB B5 (Class 5), a series of passenger carriages built by Strømmens Værksted for the Norwegian State Railways
  • PRR B5, an American 0-6-0 steam locomotive
  • SM UB-5, a German Type UB I submarine or U-boat in the German Imperial Navy
  • B5 biodiesel
  • LNER Class B5, a British class of steam locomotives

Other

  • Baseball5, the five-a-side version of baseball
  • B5 Championships, a 2001 fighting game tournament
  • %B5, the percent-encoding for the letter μ
  • B5, a paper size of the B series defined in ISO 216
  • B5, a category of stellar classification
  • Bensen B-5, a small rotor kite
  • Border Five

See also

  • 5B (disambiguation)
  • BV (disambiguation)
  • Big Five (disambiguation)