ortho-

ortho- definition - medical

ortho- or orth-

prefix
  1. Straight; upright; vertical: orthotropic.
  2. Correct; correction: orthopsychiatry.
  3. Hydrated form of an acid or of its salts: orthoboric acid.
  4. Diatomic molecules in which the nuclei have the same direction of spin: orthohydrogen.
  5. Abbr. o- Of or relating to one of three possible isomers of a benzene ring with adjacent carbon atoms having attached chemical groups: ortho-dibromobenzene.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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