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Dichotome, or Dicotome |
  
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Dichotome, or Dicotome |
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(Gr. cut in half.) Applied to that phase of the lunar orb, or of an inferior planet, in which only half of its disk appears illuminated, i.e. the First and Third Quarters, in which the body is assuming the shape of a half-moon, and in which the Moon is said to be oriental.