Dictionary.com
definitions

orthotic

[awr-thot-ik]

noun

Also orthosis. a device or support, especially for the foot, used to relieve or correct an orthopedic problem.

adjective

of or relating to orthotics.

Origin of orthotic

1960–65; adj. derivative of orthosis (on the model of psychosis: plychotic, etc.); see -tic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
orthotic in Medicine

orthotic

[ôr-thŏt′ĭk]

adj.

Of or relating to orthotics.

n.

An orthopedic appliance designed to straighten or support a body part.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.