A

A has more than one meaning. As such, this article is merely a disambiguation page, listing articles associated with A.

If you were linked to this page from another article, feel free to edit that article to make it point at the correct entry. "A" has multiple meanings. It could mean:

• The first letter of the Alphabet
• Adenine, which is a purine base in DNA and RNA; "A" pairs with thymine in DNA or uracil in RNA.
• Adenosine, which is the nucleoside containing adenine as its base.
• Amperes, a unit of electric current