Webster's New World Medical Dictionary

osteotomy
Taking out part or all of a bone, or
cutting into or through bone.
osteotomy, block
Surgical removal of a section
of bone.
osteotomy, cuneiform
Surgical removal of a tri-
angular piece of bone.
osteotomy, displacement
Surgical reconfigura-
tion of a bone by changing its physical relationship
to other bones.
ostomy
An operation to create an opening from an
area inside the body to the outside. An ostomy may be
used to permit drainage of feces (colostomy) or
urine (cystostomy) from the body when the normal
route is missing or blocked. It can be permanent or
temporary. See also 
colostomy; enterostomy.
OT 1
Occupational therapist.
2
Occupational
therapy.
otalgia
Ear pain; earache. Otalgia can originate
within the ear, the ear canal, or the external ear.
OTC
Over-the-counter.
otitis
Inflammation of the ear. See also 
ear
infection.
otitis externa
See 
ear infection, external.
oto
- Prefix meaning ear, as in otology (the study
and medical care of the ear) and otoplasty (plastic
surgery to reshape the outer ear).
otolaryngologist
See 
ENT.
otology
The study and medical care of the ear.
otopharyngeal tube
See 
Eustachian tube.
otoplasty
Plastic surgery to reshape the outer
ear.
otosclerosis
The abnormal formation of new
bone in the middle ear that gradually immobilizes
the stapes (stirrup bone) and prevents it from
vibrating in response to sound, causing progressive
loss of hearing. Otosclerosis usually affects both
ears.
otoscope
An instrument for looking in the ear.