orth(o)- (12/15)

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Orth(o)- is a medical prefix term that means “straight; correct”. 

Example Word: orth(o)/pnea 

Word Breakdown: Orth(o)- means “straight; correct”, and -pnea is a suffix term that pertains to “breathing”. 

Definition: Orthopnea refers to a shortness of breath when lying down, causing one to sleep curled up in bed.