D (disambiguation)

From Wikipedia, the free encyclopedia

D is the fourth letter of the Latin alphabet. It can also refer to the following:

Business and economy

  • D, denoting the Federal Reserve Bank of Cleveland in the serial numbers of United States dollars
  • D, Mitsubishi Electric's mobile phones in Japan
  • D, the New York Stock Exchange ticker symbol for Dominion
  • D: All Things Digital, an annual technology conference sponsored by the Wall Street Journal, produced and hosted by columnist Walter Mossberg

Computing

  • D, the name of various programming languages:
  • D, the "Minimal Protection" security division in the TCSEC
  • d (short for daemon), a suffix often added to the name of a computer program that runs as a background process
  • .d, a common pathname component suffix for a directory for a program or subsystem on POSIX and POSIX-like systems; for example "/etc/init.d" would be a directory which contains files associated with the init program.
  • .d, a file format used for Agilent MassHunter mass spectrometry software

Entertainment and film

Music

Science

Astronomy

  • D, the white dwarf stellar classification
  • D/, for "destroyed/disappeared" in comet nomenclature
  • D, a February 16 through 29 discovery in the provisional designation of a comet or asteroid

Chemistry and biology

  • D, the symbol for aspartic acid in biochemistry
  • D, the symbol of deuterium, an isotope of hydrogen, in chemistry
  • Vitamin D
  • ATC code D Dermatologicals, a section of the Anatomical Therapeutic Chemical Classification System

Genetics

  • Haplogroup D (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
  • Haplogroup_D-M174_(Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup

Places

  • D (for Deutschland), the international license plate code of Germany
  • The D River, in Oregon, USA
  • A nickname for Detroit

Mathematics

  • d, the symbol for the total differential operator (partial differentials use ∂)
  • D, often used as a digit meaning thirteen in hexadecimal and other positional numeral systems with a radix of 14 or greater
  • Blackboard bold {\mathbb  {D}}, representing the unit disk in the complex plane, or the decimal fractions (see number)
  • d, often a variable for the diameter of a circle in geometry
  • D and d, the derivative operators
  • D, the number five hundred in Roman numerals

Physics

  • {\mathbf  {D}}, the recommended symbol for electric displacement field
  • d, the recommended symbol for: thickness, diameter, relative density (mechanics), lattice plane spacing (solid state physics), and degeneracy of vibrational mode, in molecular spectroscopy
  • d, the symbol of the deuteron in particle physics
  • D, the symbol for debye, a unit of electrical dipole moment
  • D battery, a standard size dry cell battery in electronics
  • D, the name of mesons containing charm quarks in particle physics
  • D, the recommended symbol for diffusion coefficient in molecular physics
  • In solid state physics:
  • D, the standard abbreviation for an electronic diode, used e.g. in circuit diagrams

Other science

  • D region, part of the ionosphere in earth science
  • D, standing for demand in economics
  • d (deci-), the SI prefix meaning one tenth, 10-1
  • d, the symbol for day in metrology
  • d', psychophysical discriminability

Other uses

  • D, in American politics, often used as an abbreviation for a Democrat (member of the Democratic Party)
  • D, a brassiere cup size
  • d, used in role-playing games to denote the number of sides of dice
  • d (from the Latin denarius), an abbreviation for the British one penny coin
  • d, the common US measurement of the penny size (an approximation of length), of a nail (derived from denarius- as above)
  • D, in calendars an abbreviation for the month December
  • D (grade), a below average grade in education
  • D (drive), the forward cruising gears in an automatic transmission
  • D (New York City Subway service)
  • D (Los Angeles Railway), a line operated by the Los Angeles Railway
  • D band, in radio, the NATO band ranging from 1 to 2 GHz
  • D, often used in sports as an abbreviation for defense
  • D/, used to denote the dominant person in a BDSM relation
  • superscript D, the abbreviation for Dingir, the Sumerian sign for "deity"
  • D's, colloquial term for Dayton Wire Wheels
  • d., died
  • d, daughter
  • D-Company
  • D, diarrhea
  • 'd, a contraction (grammar) of the English words had and would

See also

  • All pages beginning with "D"
  • All pages with titles containing "D"
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