orthosis

As a noun orthosis

is (medicine) a type of brace which either prevents, or assists movement of a limb or the spine.

As an adjective undefined is

lacking a definition or value.

In medicine terms the difference between splint and orthosis

is that splint is a device to immobilize a body part while orthosis is a type of brace which either prevents, or assists movement of a limb or the spine.

As nouns the difference between splint and orthosis

is that splint is a narrow strip of wood split or peeled off of a larger piece while orthosis is a type of brace which either prevents, or assists movement of a limb or the spine.

As a verb splint

is to apply a splint to; to fasten with splints.

As a noun orthosis is

(medicine) a type of brace which either prevents, or assists movement of a limb or the spine.

As nouns the difference between orthoses and orthosis

is that orthoses is while orthosis is (medicine) a type of brace which either prevents, or assists movement of a limb or the spine.

As nouns the difference between prosthetic and orthosis

is that prosthetic is a prosthesis (prosthetic device) while orthosis is (medicine) a type of brace which either prevents, or assists movement of a limb or the spine.

As an adjective prosthetic

is artificial, acting as a substitute for part of the body; relating to prosthesis.