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Definitions of A:
  • noun:   the 1st letter of the Roman alphabet
  • noun:   the blood group whose red cells carry the A antigen
  • noun:   (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
  • noun:   one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
  • noun:   the basic unit of electric current adopted under the Systeme International d'Unites
    Example: "A typical household circuit carries 15 to 50 amps"
  • 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
  • noun:   any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes



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Alternative Terms
a-posteriori-4 philosophy deductive-reasoning inductive-reasoning epistemology knowledge experience tautology-logic adjective noun proton quark adolf-hitler 1945 jerry-fodor proposition latin plato-philosopher innatism meno-2 rationalism empiricism early-modern-period ren-descartes cogito-ergo-sum gottfried-leibniz john-locke tabula-rasa david-hume question-of-fact immanuel-kant time-electric-light-orchestra-album granger-causality critique-of-pure-reason objectivity-philosophy subjectivity-3 analytic-synthetic-distinction logical-positivism w-v-quine modal-logic-3 possible-world saul-kripke hilary-putnam linguistics metaphysics prolegomena-to-any-future-metaphysics self-evidence matter-of-fact necessary-contingent-truths jumping-after-wirkola spokil a-priori list-of-topics-in-epistemology list-of-decisions-and-opinions-of-the-enlarged-board-of-appeal-of-the-european-patent-office physicalism laurence-bonjour pragma-dialectics constitution-of-turkey