Ortho- is a Greek prefix meaning “straight”, “upright”, “right” or “correct”.

Ortho may refer to:

Science

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Mathematics

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  • Orthogonal, a synonym for perpendicular
  • Orthonormal, the property that a collection of vectors are mutually perpendicular and each of unit magnitude
  • Orthodrome, a synonym for great circle, a geodesic on the sphere
  • Orthographic projection, a parallel projection onto a perpendicular plane

Medicine

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  • Orthomyxovirus, a family of viruses to which influenza belongs
  • Orthodontics, a specialty of dentistry concerned with the study and treatment of malocclusions
  • Orthopedic, the study of the musculoskeletal system
  • Ortho-DOT, a psychedelic drug
  • Ortho-cept and Ortho Tri-cyclen, kinds of oral contraceptive drug

Theology

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Business

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See also

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