C

:This page is about the letter C itself. For other uses of C, see C (disambiguation).

Meanings for C

• In baseball, C is the abbreviation for the position of catcher.
• In basketball, C is the abbreviation for the position of center.
• In biochemistry, C is the symbol for the amino acid cysteine and the nitrogenous nucleic acid base cytosine.
• In business, C is a "creation" initial. It is used for the company name etc. in many Japanese companies.
• In chemistry, C is the symbol for carbon.
• In the CMYK color model, C stands for the color cyan.
• In communication, c is an abbreviation for the word "see" in SMS or instant message.
• In computing, C denotes the C programming language. Several of its derivatives have names including the letter C, for example C++, Objective-C, and C#.
• In currency, c or ¢ (c with a vertical or slanted bar through it) means cent.
• In education, C is an average grade.
• In electrical engineering,
• C is the control grid bias power supply (originally a battery) of vacuum tube circuitry.
• C is the variable for capacitance, and is used to label capacitors on schematics.
• C is a standard size of dry-cell battery.
• In espionage, C is the head of MI6.
• In finance, C is the New York Stock Exchange ticker symbol for Citigroup.
• In geometry, c is the length of a hypotenuse on a right-angled triangle when using the formula a² + b² = c².
• In gold, C is the abbreviation for Carat.
• In hardware, a C-clamp is a type of fastener, so called because its shape resembles the capital C.
• In history, c is an abbreviation for circa. When used with years, it means about (e.g., "c. 1500" means around the year 1500).
• In international relations, C sometimes represents the Commonwealth of Nations.
• In international licence plate codes, C stands for Cuba.
• In international paper sizes, C is a series of sizes with an aspect ratio of roughly 70% width to height. This series is primarily used for envelopes.
• In mathematics,
• C is often used as a digit meaning twelve in hexadecimal and other positional numeral systems with a radix of 13 or greater.
• Blackboard bold (double-struck capital C) $mathbb\{C\}$ (Unicode 0x2102 "?") denotes the set of complex numbers
• C with indices denotes the number of combinations, a binomial coefficient.
• Blackletter $mathfrak\; c$ (Unicode 0x212D "?") denotes the first beth number: the cardinality of the set of real numbers (the "continuum"), or of the power set of natural numbers.
• Cⁿ and C^∞ are notions of smooth functions, meaning "continuously differentiable n times" and "infinitely differentiable", respectively.
• In the SI system,
• c, centi, is an SI prefix meaning 1/100.
• C is the symbol for coulomb, the SI derived unit for electric charge.
• In music, C is a note; see also Middle C
• In nutrition, C is a vitamin; see Vitamin C
• In physics,
• c is the speed of light in vacuum.
• c can also be used for the speed of sound.
• c is the symbol of the charm quark.
• As the first letter of a postal code,
• In Canada, C stands for Prince Edward Island.
• In publishing, c with an enclosing circle, ©, denotes copyright
• In rail transport, C is the UIC classification for the railroad locomotive wheel arrangement known as 0-6-0 in the Whyte notation; a locomotive with three powered axles (and thus six wheels) in which the axles are linked by gearing or side rods.
• In Roman naming convention, C is the abbreviation for the praenomen Gaius.
• In Roman numerals, C denotes one hundred (centum in Latin; there are also separate Unicode characters for this number, 0x216D "?" and 0x217D "?").
• In temperature, °C is the symbol for degrees Celsius (there is also a separate Unicode character for this symbol, 0x2103 "?").
• As a timezone, C is the military designation for UTC+3, also known as MSK or Moscow Time.
• In economics, C is usually used to represent consumption.
• In Microsoft Windows, Ctrl-C, (in Mac OS, Command-C) copies the selected text, image or sound and places it on the clipboard.
• In UNIX/Linux terminals, Ctrl-C kills the current action.