D4

D4, D.IV, d4 or variants may refer to:

Science and medicine

  • 22-Dihydroergocalciferol, vitamin D4
  • D4-isoprostane, a type of isoprostane
  • ATC code D04 Antipruritics, including antihistamines, anesthetics, etc., a subgroup of the Anatomical Therapeutic Chemical Classification System
  • D04 : Carcinoma in situ of skin ICD-10 code
  • Dopamine receptor D4, a human gene
  • Octamethylcyclotetrasiloxane, called D4
  • Technology and computing

  • D4 (programming language), a programming language of the Dataphor system
  • D4 video connector, a type of analog video connector found on Japanese consumer electronics
  • D4 framing standard, a framing standard for traditional time-division multiplexing
  • Aircraft

  • Albatros D.IV, a World War I experimental German fighter aircraft
  • Auster D.4, a 1960 two-seat British light aircraft
  • Dewoitine D.4, a Dewoitine aircraft
  • Dunne D.4, a 1907 British experimental aircraft
  • Fokker D.IV, a World War I German fighter biplane
  • LFG Roland D.VI, an aircraft powered by the German Mercedes D.III engine
  • Stage works by Franz Schubert

    Franz Schubert's best-known music for the theatre is his incidental music for Rosamunde. Less successful were his many Opera and Singspiel projects. On the other hand, some of his most popular Lieder, like "Gretchen am Spinnrade," were based on texts written for the theatre.

    Incidental music and overtures for the theatre

    Overture for Der Teufel als Hydraulicus

    D 4, Overture to the vocal comedy Der Teufel als Hydraulicus for orchestra (1812?)

    Die Zauberharfe

    D 644, Music for Zauberspiel Die Zauberharfe for tenor, six spoken roles, mixed choir and orchestra (1820, in three acts: Overtures to the first and third acts, and thirteen numbers; Overture to the first act known as the "Rosamunde" Overture, also used in D 797)

    Rosamunde

    D 797, Music for Schauspiel Rosamunde, Fürstin von Zypern for alto, mixed choir and orchestra (1823, Overture and nine numbers; first published as Op. 26)

    German-language operas and Singspiele

    Der Spiegelritter

    D 11, Singspiel Der Spiegelritter for five sopranos, three tenors, four basses, mixed choir and orchestra (1811?, in three acts?; unfinished – Overture, five complete numbers and three fragments from Act I are extant)

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