Definition of orthosis in English:



  • A brace, splint, or other artificial external device serving to support the limbs or spine or to prevent or assist relative movement.

    • ‘Although occupational therapy provides a means of educating patients and social support, there are few evaluations of specific interventions such as the provision of walking aids, orthoses, and splints in controlled studies.’
    • ‘In the orthosis group, nearly all patients reported using their orthosis for about 5.5 hours each day for six days of the week.’
    • ‘There is widespread use of several semirigid orthoses made of cloth or plastic to prevent ankle sprains.’
    • ‘Most patients with adolescent idiopathic scoliosis who require treatment with a brace may use a thoracolumbar-sacral orthosis or a cervicothoracolumbar-sacral orthosis.’
    • ‘It can be treated conservatively with an orthosis (support for the foot), rest and physiotherapy.’


1950s: from Greek orthōsis ‘making straight’, from orthoun ‘set straight’.