1. logical operation an operation that follows the rules of symbolic logic
  2. logic operation an operation that follows the rules of symbolic logic
  3. alliteration use of the same consonant at the beginning of each word
  4. surgical operation a medical procedure involving an incision with instruments
  5. logical relation a relation between propositions
  6. psychological operation military actions designed to influence the perceptions and attitudes of individuals, groups, and foreign governments
  7. collaboration act of working jointly
  8. logical implication a logical relation between propositions p and q of the form `if p then q'; if p is true then q cannot be false
  9. legal separation the cessation of cohabitation of man and wife
  10. logical proof proof of a logical theorem
  11. chemical operations warfare using chemical agents to kill or injure or incapacitate the enemy
  12. calibration the act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument
  13. serial operation the sequential execution of operations one after another
  14. cooperation the practice of working together on a common enterprise
  15. geological formation (geology) the geological features of the earth
  16. optical aberration an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
  17. lucubration laborious cogitation
  18. exasperation actions that cause great irritation
  19. equilibration stabilization by bringing into equilibrium
  20. agglomeration the act of collecting in a mass

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