A

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  • noun

Synonyms for A

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron)

any of several fat-soluble vitamins essential for normal vision

one of the four nucleotides used in building DNA

(biochemistry) purine base found in DNA and RNA

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

the blood group whose red cells carry the A antigen

References in classic literature ?
I fancied a flat, and a man recommended these on the boat; such a good chap, Bunny; he was my reference when it came to signing the lease.
They are equipped with a massive tail about six feet long, quite round where it joins the body, but tapering to a flat, thin blade toward the end, which trails at right angles to the ground.
The entrance from the sea, as we have already observed, is bounded on the south side by a flat sandy spit of land, stretching in to the ocean.
There is something about a flat," she declared, "which makes one horribly curious about one's neighbors--especially if one has never had any.
And in another isle are men that have flat faces without nose and without eyes, but they have two small round holes instead of eyes and they have a flat mouth without lips.