1. A fat-soluble vitamin that is essential for normal reproduction;
    An important antioxidant that neutralizes free radicals in the body (synset 115116976)
  2. A radioactive transuranic element produced by bombarding plutonium with neutrons (synset 114661000)
  3. The cardinal compass point that is at 90 degrees (synset 113854554)
  4. The base of the natural system of logarithms;
    Approximately equal to 2.718282... (synset 113776305)
  5. The 5th letter of the Roman alphabet (synset 106844655)

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