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Zonation

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• Zond

  one of a series of soviet sp-ce probes that photographed the moon and returned to earth. noun any of a series of unmanned soviet sp-cecraft, first launched in 1964 as interplanetary sp-ce probes, the most successful of which, zond 3, sent back photographs of the hidden side of the moon in 1965

• Zone of accumulation

  . zone of acc-mulation see b horizon.

• Zone of avoidance

  the area of the sky in the plane of the milky way where interstellar dust obscures visible light so that no distant galaxies can be observed.

• Zone defense

  a method of defense, especially in basketball and football, in which each member of the defensive team guards a specified portion of the playing area.

• Zone of fire

  the area within which a unit is prepared to place its fire.

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