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Definition of Ortho- (prefix)

Ortho- (prefix): Prefix meaning straight or erect. From the Greek "orthos" that means just that: straight or erect. Examples of terms involving ortho- include orthodontics (straightening the teeth), orthopaedics (straightening the child), orthopnea (breathing easily only in an upright position), orthostatic (an upright posture), etc.

QUESTION

What causes tooth decay? See Answer
Reviewed on 12/12/2018
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