Ortho
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Wiktionary, the free dictionary.
Wiktionary, the free dictionary.
Ortho (from the Greek word ὀρθός meaning "straight" or "correct") may refer to:
- An arene substitution pattern in which two substituents occupy adjacent positions on an aromatic ring
- Orthodontics, a specialty of dentistry concerned with the study and treatment of malocclusions
- A prefix formally used to indicate the most hydrated form of an acid
