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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 periodicals archive ?
1995) described a brevetoxin PbTx-2 molecule believed to be composed of three distinct segments: a relatively rigid fourring H-K ring system, an A-ring lactone, and a B-G ring region with limited flexibility.
1996) that the carbonyl oxygen of the A-ring and the C17[beta] hydroxylic oxygen of the D-ring in DHT most likely interact through H-bonds with [Arg.
The project on the A-Ring Road-Rawdat Al Khail is schedueld for completion in early 2017.
The project offers an alternative with good rental fees for merchants of medium businesses, and it enjoys a distinctive location on A-Ring Road -- Rawdat Al Khail, three minutes away from Msheireb, in Doha downtown.
The planet's oversized family of 62 moons will soon be added when the lump from A-Ring, its outermost and brightest ring, will soon come out by 2016.
While the runaway Claire remains in hiding, these and the rest of the novel's character ensemble circle dolefully about, employing and observing Danticat's signature tropes for the undervoiced Haitian people's dire-straits desire to be heard (also, for her own authorial determination to give them voice): radio stations, lighthouses, sign language, butterflies (whose fate is to be immemori ally/memorially both mute and beautiful), and wonns (a Haitian children's singing game similar to the English "Ring a-ring o' Roses").