a
English Thesaurus
1. the blood group whose red cells carry the A antigen (noun.body)
| hypernym | : | blood group, blood type, |
| definition | : | human blood cells (usually just the red blood cells) that have the same antigens (noun.body) |
2. the 1st letter of the Roman alphabet (noun.communication)
| member meronym | : | latin alphabet, roman alphabet, |
| definition | : | the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe (noun.communication) |
3. the basic unit of electric current adopted under the Systeme International d'Unites (noun.quantity)
| hypernym | : | current unit, |
| definition | : | a measure of the amount of electric charge flowing past a circuit point at a specific time (noun.quantity) |
| part holonym | : | ma, milliampere, |
| definition | : | one thousandth of an ampere (noun.quantity) |
| part meronym | : | abamp, abampere, |
| definition | : | a unit of current equal to 10 amperes (noun.quantity) |
4. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation (noun.quantity)
| hypernym | : | metric linear unit, |
| definition | : | a linear unit of distance in metric terms (noun.quantity) |
5. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA (noun.substance)
| hypernym | : | purine, |
| definition | : | any of several bases that are derivatives of purine (noun.substance) |
| substance meronym | : | deoxyribonucleic acid, desoxyribonucleic acid, dna, |
| definition | : | (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information (noun.substance) |
| substance meronym | : | ribonucleic acid, rna, |
| definition | : | (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell (noun.substance) |
| domain category | : | biochemistry, |
| definition | : | the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry (noun.cognition) |
6. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose) (noun.substance)
| hypernym | : | base, nucleotide, |
| definition | : | a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA) (noun.substance) |
7. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes (noun.substance)
| hyponym | : | retinol, vitamin a1, |
| definition | : | an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene (noun.substance) |
| hyponym | : | dehydroretinol, vitamin a2, |
| definition | : | a viscous alcohol that is less active in mammals than is vitamin A1 (noun.substance) |
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