Online Google Dictionary

a 中文解釋 wordnet sense Collocation Usage Collins Definition
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Used when referring to someone or something for the first time in a text or conversation,
  1. Used when referring to someone or something for the first time in a text or conversation
    • - a man came out of the room
    • - it has been an honor to have you
    • - we need people with a knowledge of languages
  2. Used with units of measurement to mean one such unit
    • - a hundred
    • - a quarter of an hour
  3. One single; any
    • - I simply haven't a thing to wear
  4. Used when mentioning the name of someone not known to the speaker
    • - a Mr. Smith telephoned
  5. Someone like (the name specified)
    • - you're no better than a Hitler
  6. Used to indicate membership of a class of people or things
    • - he is a lawyer
    • - this car is a BMW
  7. Used when expressing rates or ratios; in, to, or for each; per
    • - typing 60 words a minute
    • - cost as much as eight dollars a dozen

  1. angstrom: a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
  2. vitamin A: any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
  3. deoxyadenosine monophosphate: one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
  4. adenine: (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
  5. ampere: the basic unit of electric current adopted under the Systeme International d'Unites; "a typical household circuit carries 15 to 50 amps"
  6. the 1st letter of the Roman alphabet
  7. "Ä" and "ä" are both characters which represent either a letter from several extended Latin alphabets, or the letter A with an umlaut mark or diaeresis.
  8. A bell code (sometimes bell character) is a device control code originally sent to ring a small electromechanical bell on tickers and other teleprinters (remote printers) and teletypewriters (such as Teletypes, abbreviated TTYs) to alert operators at the other end of the line, often of an ...
  9. A++ stands for abstraction plus reference plus synthesis which is used as a name for the minimalistic programming language that is built on ARS. Created by Dr. Marcus Barry.
  10. In computer science, a static library or statically-linked library is a set of routines, external functions and variables which are resolved in a caller at compile-time and copied into a target application by a compiler, linker, or binder, producing an object file and a stand-alone executable. ...
  11. The ace of spades (also known as the spadille) is, traditionally speaking, the highest card in the deck of playing cards, although the actual value of the card varies from game to game. In popular myth and folklore, it is also known as the "death card".
  12. Ã/ã (a-tilde) is a letter used in some languages, generally considered a variant of the letter A.
  13. A is a 1965 short film animated by Jan Lenica. It involves a writer tormented by a giant letter "A". He frees himself from the "A" only to encounter a "B". It began production in late 1965 and premiered at the Oberhausen Film Festival in February 1965.
  14. A is a 1998 Japanese documentary film about a Buddhist sect entitled "A".
  15. Darren James Almond (b. 1971 Appley Bridge, near Wigan, Lancashire, England) is an artist based in London. He graduated from Winchester School of Arts in 1993, with a BA (hons) degree in Fine Arts.
  16. A are a British alternative rock band from Suffolk, England, that formed in 1993. They have released four albums, and two live mini-albums.
  17. The following is a list and description of Beanie Babies made by Ty, Inc. This list is heavily incomplete.
  18. The letter Å (small å) represents various sounds in the alphabets used for Danish, Norwegian, Swedish, Finnish (although no native Finnish words contain the letter å), North Frisian, Walloon, Chamorro, Istro-Romanian, Lule Sami, Skolt Sami, Southern Sami, Greenlandic, and the Alemannic and ...
  19. A is the debut album by Cass McCombs and was released on May 20, 2003 on Monitor Records.
  20. Dance Dance Revolution Extreme is a music video game by Konami and is the eighth release in the main Dance Dance Revolution series. It was released on December 25, 2002 for Japanese arcades and on October 9, 2003 for the Japanese PlayStation 2. ...
  21. In mathematics and computer science, hexadecimal (also base , or hex) is a positional numeral system with a radix, or base, of 16. ...
  22. An academic grade issued by certain educational institutions. Slightly better than an A
  23. Marks the first item in a list; The hexadecimal digit for 10
  24. (A/S) Maintenance service provided after the sale of a product
  25. (A s) table production with no interruptions