Link Centre Dictionary

A

UK/ˈʌ/ US/ɑ/ very common informal slang uk us

noun

1.

the blood group whose red cells carry the A antigen

Synonyms
2.

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

Synonyms
3.

any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

Synonyms
4.

one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

Synonyms
5.

(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

Synonyms
6.

the basic unit of electric current adopted under the Systeme International d''Unites

  • “a typical household circuit carries 15 to 50 amps”
Synonyms
7.

the 1st letter of the Roman alphabet

Origin

From Middle English a, an, from Old English ān (“one; a; lone; sole”).

Phrases

  • A cup Rank or size
  • a few
  • A game Rank or size
  • a great many
  • A level Rank or size
  • A team Rank or size
  • double A Rank or size
  • grade A Rank or size
  • triple A Rank or size

Related words

Broader terms

Narrower terms

Parts

Part of

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.