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Definition of Ã
1. Noun. A metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation.
Generic synonyms: Metric Linear Unit
Terms within: Micromicron, Picometer, Picometre
Group relationships: Micromillimeter, Micromillimetre, Millimicron, Nanometer, Nanometre, Nm
2. Noun. Any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes.
Generic synonyms: Fat-soluble Vitamin
Specialized synonyms: Retinol, Vitamin A1, Dehydroretinol, Vitamin A2
3. Noun. One of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose).
4. Noun. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA.
Category relationships: Biochemistry
Generic synonyms: Purine
Substance meronyms: Deoxyribonucleic Acid, Desoxyribonucleic Acid, Dna, Ribonucleic Acid, Rna
5. Noun. The basic unit of electric current adopted under the Systeme International d'Unites. "A typical household circuit carries 15 to 50 amps"
Generic synonyms: Current Unit
Terms within: Ma, Milliampere
Group relationships: Abamp, Abampere
6. Noun. The 1st letter of the Roman alphabet.
Generic synonyms: Alphabetic Character, Letter, Letter Of The Alphabet
7. Noun. The blood group whose red cells carry the A antigen.
Definition of Ã
1. prep. In; on; at; by.
Medical Definition of Ã
1.
1. First letter of the Greek alphabet, alpha, used as a classifier in the nomenclature of many sciences.
2. Symbol for atto-, Bunsen's solubility coefficient, specific optical rotation, absorbance, specific absorption coefficient, degree of dissociation, adenosine or adenylic acid in polynucleotides, alanine in polypeptides, first substrate in a multisubstrate enzyme=catalyzed reaction
3. In chemistry, denotes the first in a series, a position immediately adjacent to a carboxyl group, the first of a series of closely related compounds, an aromatic substituent on an aliphatic chain, or the direction of a chemical bond away from the viewer.
4.
Lexicographical Neighbors of A
9/11 90 90th 91 92 93 94 95 95th 96 | 97 98 99 9th a A A'man a' haemolysis A-bomb A-DNA | A-esotropia A-exotropia A-E amputation a-factor a-form DNA a-good A-horizon A-H conduction time A-H interval A-K amputation |