appulse
  半影月食; 合
  Ap·pulse n.
  1. A driving or running towards; approach; impulse; also, the act of striking against.
     In all consonants there is an appulse of the organs.   --Holder.
  2. Astron. The near approach of one heavenly body to another, or to the meridian; a coming into conjunction; as, the appulse of the moon to a star, or of a star to the meridian.
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