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Definitions
ortho- Tweet Definition of ortho- Like Definition of ortho- on Facebook
prefix 
  1. straight, right, proper
  2. (chemistry) Having an extra proportion of water
  3. (chemistry) in isomeric benzene derivatives, having the two substituents in adjacent positions (compare meta- and para-)
  4. (physics) of any molecule of the form X2 in which the two nuclei have parallel spin
Etymology: :from á (orthos)

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