Browse foot terms that start with 'O' and view definitions.
Onychauxis is the abnormal thickening of fingernails and/or toenails without the presence of deformity.
An onychectomy is a surgical procedure in which part or all of a fingernail or toenail is removed. It is often performed on the big toe to help ward off ingrown toenail infections and recurrences of the painful condition.
Onychocryptosis is the medical term for an ingrown toenail, a common foot condition in which the nail grows into the skin that surrounds it.
Onychogryphosis is the scientific name for Ram's Horn Nails, which is an extreme thickening and lengthening of the nails to such a degree that they begin to look like claws or the horns on top of a ram's head.
Onycholysis is the medical term for the painless detachment of the nail from the nail bed. It can happen to both fingernails and toenails and usually affects more than one nail at a time.
Onychomycosis, sometimes called tinea unguium, is the medical term for a fungal infection of the nail. Toenail fungus infections are common, with about 10 percent of the adult population experiencing the infection at some time.
An orthosis is an externally applied device that controls body alignment, corrects or accommodates a deformity or protects and supports an injury. Examples include knee braces and body jackets for spinal issues.
A specialization in the medical field, orthotics is the design, manufacture and application of externally applied devices called orthoses that control body alignment, correct or accommodate deformities, or protect and support injuries.
Osteomyelitis is a term used to describe infection or inflammation of the bone and/or bone marrow.
Commonly referred to as a bone spur or a parrots beak, an osteophyte is a bony projection that forms along joint margins.
Over pronation is a foot condition in which the foot rolls inward every time the heel strikes the ground. This abnormal movement minimizes shock absorption and leads to the foot and ankle having trouble stabilizing the body.