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{{Speedy}}
{{Disambiguation}}
"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.
*[[Ampere]]s, a unit of electric current