Definition of A in English :
Define A in English
A meaning in English
Meaning of A in English
Pronunciation of A in English
A pronunciation in English
Pronounce A in Englishsee synonyms of a
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
4. a, adenine
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
the basic unit of electric current adopted under the Systeme International d'Unites
Example Sentences:'a typical household circuit carries 15 to 50 amps'
the 1st letter of the Roman alphabet
WordNet Lexical Database for English. Princeton University. 2010.
Collins English Dictionary. Copyright © HarperCollins Publishers
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.
The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.