Quick Quiz: Nouns Score:
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Definition: the intellectual conception of a thing as it is in itself, not as it is known through perception

Your choice?
  • thiobacteriaceae
  • thing-in-itself
  • thirteen
  • thorium  (Definition: a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands)