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Word of the Day Wednesday, June 10, 2026

ortho

/ɔrθoʊ/ prefix · British & US
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What does ortho mean?

prefix

Ortho- is a prefix used in the formation of words related to straight, correct, or normal, often used in medical and scientific contexts.

Example

"The orthodontist specialized in straightening teeth using various orthodontic appliances."

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Etymologically related

Synonyms for ortho

Antonyms of ortho

Rhymes with ortho