On

On, on, or ON may refer to:

Arts and entertainment

Music

Other media

Places

  • On (Ancient Egypt), a Hebrew form of the ancient Egyptian name of Heliopolis
  • On, Belgium, a section of the Belgian municipality of Marche-en-Famenne
  • On, the Luxembourgish name of the village Ahn.
  • Ontario, a Canadian province

Science, technology, and mathematics

Biology and medicine

  • Operative note, documentation of care relating to an operation
  • Optic neuritis, especially relevant in multiple sclerosis
  • Osteonecrosis, death of bone tissue
  • Osteonectin, a glycoprotein

Other uses in science, technology, and mathematics

Other uses

See also

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