ortho-, orth-

(Greek: right, straight, correct, true; designed to correct)

orthopercussion
Percussion on the body with the distal phalanx of the finger held perpendicularly to the body wall; used to determine the size of the heart, the faint percussion sound disappearing when the heart is reached even though that may be overlapped by a layer of the lung.
orthophobia (s) (noun) (no plural)
An extreme reverence or awe of proper behaviour or propriety: Mr. Smith was always overly concerned about being correct, having the appropriate deportment, and saying the right thing at the right time, and was considered by his friends as having orthophobia!
orthophony
1. The art of correct speaking or enunciation.
2. The accurate and correct production of the various sound components during speech.
orthophoria
The spontaneous accurate alignment of the eyes for a given distance of fixation, without the aid of fusion stimuli.
orthophoric
Pertaining to the spontaneous precise alignment of the eyes upon the object of fixation.
orthophototropic
A descriptive reference to an orientation response towards light.
orthophototropism
An orientation response towards light.
orthophrenia
1. Soundness of mind.
2. A condition of normal interpersonal relationships.
orthopia
A condition of normal vision and alignment of the eyes.
orthoplessimeter
An oblong flexible plate used in mediate percussion by being placed against the surface of the chest and struck with the plessor (small hammer, usually with soft rubber head, used to tap the body part directly, or with a plessimeter, in percussion of the chest or other part).
orthopnea, orthopnoea (British)
1. The ability to breathe easily only in an upright or sitting position or discomfort in breathing which is brought on or aggravated by lying down.
2. Shortness of breath experienced when lying down.
3. Difficult breathing that is partially, or wholly, relieved by an erect sitting or standing position; associated with various cardiac or respiratory disorders.
orthopneic position
The upright, or nearly upright, position of the upper trunk of a patient in a bed or chair.

It facilitates breathing in those with congestive heart failure and some forms of pulmonary disease.

orthopod
Slang for orthopedist.
orthopraxy, orthopraxis (s) (noun)
Correction of body and limb deformities with the use of a mechanical apparatus or devices: "The woman's doctor prescribed orthopraxy as a method for correcting the deformities of her legs which happened during the auto accident."
orthopsychiatry
1. The division of psychiatry concerned with mental hygiene, prevention of mental disorder, and early detection of developmental deviations.
2. The branch of psychiatry concerned with mental and emotional development.

It encompasses child psychiatry and mental hygiene.