D (disambiguation)
Look up D in Wiktionary, the free dictionary.
D is the fourth letter of the Latin alphabet. It can also refer to the following.
Science
Astronomy
- D stands for the white dwarf stellar classification
- D stands for destroyed/disappeared comet, as in D/1993 F2, Comet Shoemaker-Levy 9
- D stands for a February 16 through 29 discovery, in the provisional designation of a comet or asteroid
General/other
- D is the symbol for aspartic acid in biochemistry
- D is the symbol of deuterium, an isotope of hydrogen, in chemistry
- The D layer is part of the ionosphere in earth science
- D stands for demand in economics
- D is a standard size dry cell battery in electronics
- D is the symbol for debye, a unit of electrical dipole moment
- D is the recommended symbol for electric displacement field
- d (deci), is the SI prefix meaning one tenth, 10-1
- d is the symbol for day in metrology
- D is a vitamin
Genetics
- Haplogroup D (mtDNA) is a human mitochondrial DNA (mtDNA) haplogroup
- Haplogroup D (Y-DNA) is a Y-chromosomal DNA (Y-DNA) haplogroup
Physics
- d is the symbol of the deuteron in particle physics
- D is the name of mesons containing charm quarks in particle physics
- D is the recommended symbol for diffusion coefficient in molecular physics
- d is the recommended symbol for: thickness, diameter, relative density (mechanics), lattice plane spacing (solid state physics), and degeneracy of vibrational mode, in molecular spectroscopy
- In solid state physics
- D is the recommended symbol for the Debye-Waller factor
- D as a function of energy, D(E), or wavenumber, D(k), is a symbol for the density of states
Mathematics
- d is the symbol for the total differential operator (partial differentials use ∂)
- D is often used as a digit meaning thirteen in hexadecimal and other positional numeral systems with a radix of 14 or greater
- Blackboard bold represents the unit disk in the complex plane, or the decimal fractions (see number)
- d is often a variable for the diameter of a circle n geometry
- D and d are the derivative operators
Computing
D is the name of various programming languages; see:
- D (programming language), created by Walter Bright as a successor to C++
- Tutorial D, a database query language proposed by Christopher J. Date and Hugh Darwen
- Dialog Manager programming language
- The Data Language, an MS-DOS 4GL
- D functional programming language, a Haskell-like language, with type classes
- D programming language (Sun), designed to be used with the DTrace dynamic tracing framework
- Filetab-D, a language based on decision tables
D may also refer to:
- D is a security division ("Minimal Protection") in the TCSEC
- D is shorthand for The D Conference: All Things Digital
Arts and entertainment
Music
- D is a note
- D (film) is a 2005 Bollywood film
- "The D" is one of the names of comedy rock band Tenacious D
- The Christian rock band Delirious? is often referred to as "d:" or "d:?"
- D (Japanese band) is the name of a Japanese visual kei band
- "D!" or "Dee!", names of Detlef Soost, a German dancer and choreographer
- D (album) is a 2004 album by Japanese hard rock artist Des-ROW
Other
- D Magazine is a magazine for the city of Dallas, Texas
- In the manga and anime One Piece, people with the middle initial "D" all have a sort of connection
- D (video game) was a game released in the mid-1990s for the 3DO, PlayStation and Sega Saturn
- Count D is a character in the anime/manga series Pet Shop of Horrors
- Vampire Hunter D is the title character in a series of novels by Hideyuki Kikuchi
- D is one of the characters in Trace Memory
- Initial D is a Japanese manga and anime about mountain drifting that has spawned several arcade and console games
Other uses
- In American politics, D is often used as an abbreviation for a Democrat
- D is a brassiere cup size
- In role-playing games, d is used to denote the number of sides of dice
- In British currency, d is an abbreviation (from the Latin denarius) for the pre-decimalization penny, worth 1/240th of a pound
- In calendars, D is often an abbreviation for the month December
- In education, D is a below average grade
- In finance, D is the New York Stock Exchange ticker symbol for Dominion Resources
- In international licence plate codes, D stands for Germany (Deutschland)
- In motor vehicles, D (drive) designates the forward cruising gears in an automatic transmission
- In radio, the NATO D band ranges from 1 to 2 GHz
- In Roman numerals, D denotes the number five hundred. (There are also separate Unicode characters for this number, U+216E "Ⅾ" and U+217E "ⅾ")
- In sports, D is often used as an abbreviation for defence
- Amongst high-schoolers D is a name for the penis
- D/ is used to denote the dominant person in a BSDM relation
- On the serial numbers of United States dollars, D identifies the Federal Reserve Bank of Cleveland
- D is the stock market symbol for Dominion Virginia Power
- Substance D is a fictional recreational drug in the Philip K. Dick novel (and film of the same name), A Scanner Darkly.
This disambiguation page lists articles associated with the title D.
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