1. biological warfare defense defense against biological warfare
  2. biological warfare defence defense against biological warfare
  3. biological defense procedures involved in taking defensive measures against attacks using biological agents
  4. biological defence procedures involved in taking defensive measures against attacks using biological agents
  5. biological warfare the use of bacteria or viruses or toxins to destroy men and animals or food
  6. biological science the science that studies living organisms
  7. biological research scientific research conducted by biologists
  8. biological process a process occurring in living organisms
  9. zoological garden the facility where wild animals are housed for exhibition
  10. ecological warfare violence carried out to further the political or social objectives of the environmentalists
  11. geological formation (geology) the geological features of the earth
  12. biological terrorism terrorism using the weapons of biological warfare
  13. biological weapon any weapon usable in biological warfare
  14. Secretary of Defense the position of the head of the Department of Defense
  15. passive air defense air defense by the use of deception or dispersion or protective construction
  16. biological agent any bacterium or virus or toxin that could be used in biological warfare
  17. psychological warfare the use of psychological tactics to destroy the opponents' morale
  18. active air defense air defense by the use aircraft or missiles or artillery or electronic countermeasures
  19. theological virtue according to Christian ethics: one of the three virtues (faith, hope, and charity) created by God to round out the natural virtues
  20. deliberate defense a defense organized before contact is made with the enemy and while time for organization is available; usually includes a fortified zone (with pillboxes) and communication systems