(used with a singular verb) a branch of medicine dealing with the making and fitting of orthotic devices.

1960–65; see orthotic, -ics

orthotist [awr-thot-ist, awr-thuh-tist] , noun
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[awr-thot-ik] ,
Also, orthosis. a device or support, especially for the foot, used to relieve or correct an orthopedic problem.
of or pertaining to orthotics.

1960–65; adj. derivative of orthosis (on the model of psychosis: plychotic, etc.); see -tic

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
orthotics (ɔːˈθɒtɪks)
(functioning as singular) the provision and use of artificial or mechanical aids, such as braces, to prevent or assist movement of weak or injured joints or muscles

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American Heritage
Medical Dictionary

orthotic or·thot·ic (ôr-thŏt'ĭk)
Of or relating to orthotics. n.
An orthopedic appliance designed to straighten or support a body part.

orthotics or·thot·ics (ôr-thŏt'ĭks)
The science that deals with the use of specialized mechanical devices to support or to supplement weakened or abnormal joints or limbs. Also called orthetics.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
In some cases, orthotics may be needed to control arch and heel and balance the forefoot.
Consider insoles or orthotics with arch support for problem feet.
Subjects will walk with and without their orthotics.
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