A (CloudMonk.io)

A



Return to Consonant, Vowel, Alphabet, Letter (alphabet), ISO basic Latin alphabet, English alphabet, English orthography

See: A Records

A is the first vowel and letter in the Sanskrit alphabet. The phoneme "a" is thought to be the source of all other phonemes and its corresponding letter the origin of all other letters. As the basis of both the Sanskrit phonemic system and the written alphabet, the letter "a" Thus Comes to be invested with mystical significance as the source of truth, non-differentiation, and emptiness (shunyaTa), or even of the universe as a whole. The Prajna ParamitasarvatathaGATAMaTa-EKaKshARa, the shortest of the perfection of wisdom scriptures, also describes how the entirety of the perfection of wisdom is subsumed by this one letter. The letter in the Sanskrit SiddhaM alphabet gained special significance within the esoteric Buddhist traditions in Japan (MIKKYo), such as Shingon (see SHINGONSHu), which considered it to be the "seed" (BiJA) of MAHaVairochana, the central divinity of esoteric Buddhism, and used it in a distinctive type of meditation called AJIKAN ("contemplation of the letter 'a'"). The letter "a," which is said to be originally uncreated (AJI HONPUSHo), is interpreted to be the essence of all phenomena in the universe and the Dharmakaya of the Buddha Maha Vairochana. In the East Asian Chan traditions, the letter "a" is also sometimes understood to represent the Buddha nature (FOXING, S. Buddhadhatu) of all sentient beings.

dict>A on Wiktionary

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A is the first letter of the Sanskrit alphabet, Latin alphabet and English alphabet.

A may also refer to:

Science and technology


= Quantities and units

=
* a', a measure for the attraction between particles in the wp>Van der Waals equation
* wp>A value|A value (A), a measure of substituent effects on the wp>stereochemistry of wp>cyclohexane
* wp>Absorbance (A)
* Acceleration (a)
* wp>Activity (chemistry) (a)
* Adsorption (a)
* Annum (a), for year
* wp>Hectare#Are|are (a), a unit of area equal to 100 square metres (redirects to hectare)
* wp>atto- (a), the SI prefix meaning 10−18
* Ampere (A), the SI base unit of electric current
* ångström (Å), a unit of length equal to 1Error: File not found: e|−10 metres
* Area (A)
* wp>Attenuation coefficient (a)
* wp>Bohr radius (a0)
* wp>Chemical affinity (A)
* Gain (electronics) (A) - Gain
* wp>Hall coefficient (AH)
* wp>Hamaker constant (A)
* wp>Helmholtz free energy (A)
* wp>Hyperfine coupling constant (a or A)
* wp>Magnetic vector potential (A)
* wp>Mass number (A)
* wp>Pre-exponential factor (A)
* The unique, or one of the, wp>reciprocal lattice vector(s) (a*)
* wp>Relative atomic mass (Ar)
* wp>Richardson's constant (A)
* wp>Rotational constant (A)
* wp>Specific surface area (a)
* wp>Thermal diffusivity (a)
* wp>Unit cell length (a)


=Biology

=
* A+ and A−, human blood types
* Vitamin A, also called retinol, an essential human nutrient
* wp>Haplogroup A (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
* wp>Haplogroup A (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
* wp>Adenine, a wp>nucleic acid
* wp>Adenosine, a wp>nucleoside
* wp>Alanine, an amino acid
* wp>ATC code A, Alimentary tract and metabolism, a section of the Anatomical Therapeutic Chemical Classification System

= Computing

=

Programming languages


* A+ (programming language)
* A Sharp (Axiom)|A♯, an object-oriented functional programming language
* A Sharp (.NET) (also written "A#"), a port of Ada to the Microsoft .NET Platform
* BASIC A+

Other uses in computing


* A* search algorithm, a pathfinding algorithm
* A-0 System, an early computer compiler
* Error: File not found: tag|a|content=, the HTML element#Anchor|HTML element for an anchor tag
* a, equivalent (qname) to the wp>RDF Schema#Properties|RDF Schema Property rdf:type
* A level of web accessibility defined by the Web Content Accessibility Guidelines
* The List of DNS record types|address record type of DNS, defined in RFC 1035

= Mathematics and logic

=
* A numerical digit meaning ten in hexadecimal and other positional numeral systems with a radix of 11 or greater
* Sometimes in wp>blackboard bold represents the algebraic numbers (\mathbb{A}) (U+1D538 in Unicode)
* Universal quantifier in symbolic logic (symbol ∀ or \forall, an inverted letter A)
* Universal affirmative, one of the four types of categorical proposition in logic
* wp>Mills' constant is represented by the symbol A
* wp>Glaisher–Kinkelin constant is also often represented by the symbol A

=Other uses in science and technology

=
For vehicles and transport
* A battery, a vacuum tube filament type battery
* List_of_battery_sizes#Cylindrical_batteries|A battery (size), a standard battery size
* Anode, an electrode
* wp>Argon, symbol formerly A, now Ar
* The center of a hexagonal face of the wp>Brillouin zone of a hexagonal lattice, in physics

= Music

=
* wp>A (musical note), the sixth solfège note
* wp>A major, a scale
* wp>A minor, a scale
* A major chord; see wp>Chord names and symbols (popular music)

Geography


* Austria, on the wp>vehicle registration plates of the European Union

Linguistics


=Letters

=
* A (or a), the first letter of the Latin alphabet
* wp>A (Bengali), the romanized name of the Bengali letter অ
* wp>A (cuneiform), the romanized name of a cuneiform sign
* wp>A (Cyrillic) (A or а), the first letter of the Cyrillic alphabet
* wp>A (kana) (or a), the romanized name of the Hiragana syllable letter あ and of the Katakana syllable letter ア used in Japanese, which may also be used to represent Asia
* Alpha (Α or α), the first letter of the Greek alphabet

=Other uses in linguistics

=
* A and an, the indefinite article in English
* wp>List of glossing abbreviations|A, a glossing abbreviation for agent-like argument of canonical transitive verb
* Error: File not found: IPA|a, the IPA representation of the wp>open front unrounded vowel
* Error: File not found: IPA|ɑ, the IPA representation of the wp>open back unrounded vowel
* a., an abbreviation of ante (Latin language (Latin for "before") used in =etymologies

Philosophy and religion


* Alpha, (sometimes A) in wp>Christian theology, a metaphor for the beginning/creation of time and matter
* An wp>Anarchist symbolism|anarchist symbol, an A within a circle

Transport


=Automobile

=
* wp>Ford Model A, a name used by two separate cars produced by the wp>Ford Motor Company:
** wp>Ford Model A (1903–04)
** wp>Ford Model A (1927–31)

Other uses


* A (grade), an academic grade
* A series of paper sizes defined by wp>ISO 216, e.g. A4, A5 sizes
* wp>A formation, an American football offensive formation
* wp>A-Frame, a type of structure
* Ace, a playing card

See also


* wp>Å (disambiguation)
* ⓐ and Ⓐ, see Enclosed Alphanumerics




Disambiguation in a Wiki is the process of resolving conflicts that arise when a potential article title is ambiguous. (See Disambiguation)










Research It More


Research:
* dict>A on Wiktionary
* ddg>A on DuckDuckGo
* reddit>A on Reddit
* youtube>A on YouTube

* oreilly>A on O'Reilly
* github>A on GitHub
* reddit>A on Reddit
* stackoverflow>A on StackOverflow


Fair Use Sources


Fair Use Sources:
* ddg>A on DuckDuckGo


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