ortho-, orth-

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

A method by which the exact outlines of a bodily organ; especially, the heart, can be measured by using a fluoroscopic image.
An instrument that uses a radiologic method of obtaining a non-magnified image of the heart or other structures, by direct tracing of its silhouette as projected on a fluoroscopic screen.
A radiologic method of obtaining a nonmagnified image of the heart or other structures, by direct tracing of its silhouette as projected on a fluoroscopic screen.
1. The art of correcting deformities of the toes and fingers.
2. The division of podiatry that deals with the correction of deviated toes.
3. The prevention and correction of deformities of the fingers or toes.
The branch of dentistry which is concerned with the prevention and correction of irregularities and faulty positions of the teeth.
orthodontic (adjective) (not comparable)
Pertaining to, or referring to, the correction of abnormal dental conditions, including related abnormalities in facial structures: Lester went to his dentist to have orthodontic treatments in order to get his teeth adjusted for better chewing of his food and appearance when he smiled or opened his mouth.
Relating to the correcting of faulty positioning of the teeth by a dentist.
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1. The branch of dentistry dealing with the prevention or correction of irregularities of the teeth.
2. That branch of dentistry that specializes in the diagnosis, prevention, and treatment of dental and facial irregularities.

The technical term for these problems is malocclusion, which means "bad bite".

The practice of orthodontics involves the design, application and control of corrective appliances (braces) to bring teeth, lips and jaws into proper alignment and achieve facial balance.

1. A specialist in the area of dentistry concerned with the prevention and correction of abnormally positioned or aligned teeth.
2. A dentist who is concerned with correcting and preventing irregularities of teeth and their poor occlusions.
The study of irregularities in position of the teeth, and of malocclusions, and their treatment.
The branch of dentistry dealing with the prevention, or correction, of irregularities of the teeth.
1. Holding right or correct opinions, i.e. such as are currently accepted as correct, or are in accordance with some recognized standard; such as, in theology or other subjects (science, medical, etc.).
2. Of opinions or doctrines; right, correct, true; in accordance with what is accepted or authoritatively established as the true view or right practice; originally, in theological and ecclesiastical doctrine.
3. Correct or sound in doctrine; holding the commonly accepted faith, established doctrines, etc.

People are usually more firmly convinced that their opinions are precious than that they are true.

—George Santayana
orthodox sleep
1. Dreamless sleep, characterized by a slow alpha rhythm of brain waves and no marked physiological changes.
2. A recurring sleep state during which rapid eye movements do not occur and dreaming does not occur.

This kind of sleep accounts for about 75% of normal sleep time.

The quality or state of being orthodox; orthodoxy.
1. Belief in an established doctrine.
2. Agreement with accepted standards, established doctrines, ideas, etc.
1. Concerning movement of impulses in their normal direction.
2. A reference to nerve impulses moving in a normal direction.