Jump to content

A (disambiguation)

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Motivação (talk | contribs) at 15:17, 20 November 2016 (Music). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

A is the first letter of the Latin alphabet.

A may also refer to:

Science

  • A battery, a vacuum tube filament battery
  • Vitamin A, also called retinol, an essential human nutrient
  • Haplogroup A (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
  • Haplogroup A (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
  • A+ and A-, human blood types
  • Adenine, nucleic acid
  • Alanine, amino acid
  • Adenosine, nucleoside
  • ATC code A, Alimentary tract and metabolism, a section of the Anatomical Therapeutic Chemical Classification System
  • Anode, an electrode
  • The center of a hexagonal face of the Brillouin zone of a hexagonal lattice, in physics
  • The letter "A" was formerly the chemical symbol for the element argon, which is now indicated by the symbol Ar.

Astronomy

Abbreviations for physical and chemical quantities and units

Mathematics and logic

Computing

The arts

Music

Literature

Film

Film ratings

Television

Geography

Linguistics

  • A and an, the indefinite article in English
  • A, the agent-like argument of canonical transitive verb
  • A (or a), the first letter of the Latin alphabet
  • A (Cyrillic) (A or а), the first letter of the Cyrillic alphabet
  • Alpha (Α or α), the first letter of the Greek alphabet
  • 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
  • a, the IPA representation of the open front unrounded vowel
  • ɑ, the IPA representation of the open back unrounded vowel
  • a., an abbreviation of ante (Latin for "before") used in etymologies

Transport

Ships

Other

See also