1. spherical aberration an optical aberration resulting in a distorted image
  2. chemical operations warfare using chemical agents to kill or injure or incapacitate the enemy
  3. serial operation the sequential execution of operations one after another
  4. optical aberration an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
  5. surgical operation a medical procedure involving an incision with instruments
  6. spherical polygon a figure on the surface of a sphere bounded by arcs of 3 or more great circles
  7. sphericalness the roundness of a 3-dimensional object
  8. spherical triangle a spherical polygon formed by the arcs of 3 great circles
  9. logical operation an operation that follows the rules of symbolic logic
  10. partial abortion termination of pregnancy without expulsion of all of the products of conception
  11. sequential operation the sequential execution of operations one after another
  12. psychological operation military actions designed to influence the perceptions and attitudes of individuals, groups, and foreign governments
  13. theatre of operations a region in which active military operations are in progress
  14. collaboration act of working jointly
  15. reverberation a remote or indirect consequence of some action
  16. field of operations a region in which active military operations are in progress
  17. sacrifice operation killing or injuring others while annihilating yourself
  18. calibration the act of checking or adjusting (by comparison with a standard) the accuracy of a measuring instrument
  19. base of operations installation from which a military force initiates operations
  20. parallel operation the simultaneous execution of two or more operations

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.