HyperDic: a

English > 7 senses of the word A / a:
NOUNquantityA, angstrom, angstrom unita metric unit of length equal to one ten billionth of a meter (or 0.0001 micron)
substanceA, vitamin A, antiophthalmic factor, axerophtholany of several fat-soluble vitamins essential for normal vision
substanceA, deoxyadenosine monophosphateone of the four nucleotides used in building DNA
substanceA, adenine(biochemistry) purine base found in DNA and RNA
quantityA, ampere, ampthe basic unit of electric current adopted under the Systeme International d'Unites
communicationA / athe 1st letter of the Roman alphabet
bodyA, type A, group Athe blood group whose red cells carry the A antigen
A / a > pronunciation
Soundsah; ey'
English > A: 7 senses > noun 1, quantity
MeaningA metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation.
Synonymsangstrom, angstrom unit
Part ofnanometer, nanometre, nm, millimicron, micromillimeter, micromillimetreA metric unit of length equal to one billionth of a meter
Partspicometer, picometre, micromicronA metric unit of length equal to one trillionth of a meter
Broadermetric linear unitA linear unit of distance in metric terms
CatalanA, àngstrom
English > A: 7 senses > noun 2, substance
MeaningAny of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes.
Synonymsvitamin A, antiophthalmic factor, axerophthol
Narrowervitamin A1, retinolAn unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene
vitamin A2, dehydroretinolA viscous alcohol that is less active in mammals than is vitamin A1
Broaderfat-soluble vitaminAny vitamin that is soluble in fats
Catalanvitamina A
English > A: 7 senses > noun 3, substance
MeaningOne of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose).
Synonymdeoxyadenosine monophosphate
Broadernucleotide, baseA phosphoric ester of a nucleoside
English > A: 7 senses > noun 4, substance
Meaning(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA.
Synonymadenine
CategorybiochemistryThe organic chemistry of compounds and processes occurring in organisms
BroaderpurineAny of several bases that are derivatives of purine
Substance ofdeoxyribonucleic acid, desoxyribonucleic acid, DNA(biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix
ribonucleic acid, RNA(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
Catalanadenina
Spanishadenina
English > A: 7 senses > noun 5, quantity
MeaningThe basic unit of electric current adopted under the Systeme International d'Unites.
Synonymsampere, amp
Part ofabampere, abampA unit of current equal to 10 amperes
Partsmilliampere, mAOne thousandth of an ampere
Broadercurrent unitA measure of the amount of electric charge flowing past a circuit point at a specific time
Catalanamper
English > A / a: 7 senses > noun 6, communication
MeaningThe 1st letter of the Roman alphabet.
Member ofRoman alphabet, Latin alphabetThe alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe
Broaderletter, letter of the alphabet, alphabetic characterThe conventional characters of the alphabet used to represent speech
Catalana
SpanishA
English > A: 7 senses > noun 7, body
MeaningThe blood group whose red cells carry the A antigen.
Synonymstype A, group A
Broaderblood group, blood typeHuman blood cells (usually just the red blood cells) that have the same antigens
CatalanA, grup A, tipus A
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