-onium
ONJ
onko-
ONL
onlay
onlay graft
ONM
ONMRS
ONNV
Onodi cell
Onodi, A
on-off phenomenon
onomatomania
onomatophobia
onomatopoiesis
ONP
ONPG
ONS
ONSD
onset of action
onset of blood lactate accumulation
ONSF
on-site massage
ONSM
ONTD
ontogenesis
ontogenetic
ontogenic homeostasis
ontogeny
ontology
ONTR
Onuf nucleus
Onufrowicz, W
onyalai
onych-
onychalgia
onychatrophia
onychauxis
onychectomy
onychia
onychia maligna
onychia sicca
onychitis
onycho-
onychoclasis
onychocryptosis
onychodystrophy
onychograph
onychogryposis
onychoheterotopia
onychoid
onychology
onycholysis
onychoma
onychomadesis
onychomalacia
onychomycosis
onychopathic
onychopathology
onychopathy
onychophagy
onychophosis
onychoplasty
onychoptosis
onychorrhexis
onychoschizia
onychosis
onychostroma
onychotillomania
onychotomy
onychotrophy
O'nyong-nyong fever
o'nyong-nyong virus
onyx
oo-
OO
O-O
OOA
OOB
OOBBRP
OOBL
OOC
oocyesis
oocyst
oocyte
OOD
OOF
OOG
oogenesis
oogenetic
oogenic
oogonium
OOH
OOH&NS
OOH/CA
OOH-SCD
OOI
ookinesis
ookinete
OOL
oolemma
OOLR
OOM
oomycosis
OOP
oophagia
oophor-
oophoralgia
oophorectomy
oophoritic cyst
oophoritis
oophoro-
oophorocystectomy
oophorocystosis
oophorohysterectomy
oophoron
oophoropathy
oophoropexy
oophoroplasty
oophororrhaphy
oophorosalpingectomy
oophorosalpingitis
oophorostomy
oophorotomy
oophorrhagia
ooplasm
OOPS
OOR
OORR
OORW
OOS
oosome
oosporangium
oospore
OOT
ootheca
ootid
ootype
OOW
Op
OP
op reg
op. cit.
OP-1
OPA
OPAC
opacification
opacifying gallstones
opacity
opal codon
opal mutation
opalescent
opalescent dentin
Opalski cell
Opalski, A
opaque
opaque microscope
OPAT
OPB
OPC
OPCA
OPCAB
OPCD
OPCOS
OPCP
OPCS-4
OPD
OpDent
OPDG
OPDUR
OPE
open
open amputation
open biopsy
open bite
open chain compound
open chest massage
open circuit method
open comedo
open contact
open cordotomy
open dislocation
open drainage
open drop anesthesia
open flap
open fracture
open head injury
open heart surgery
open hospital
open kinetic chain
open laparoscopy
open pneumothorax
open reading frame
open reduction and internal fixation
open reduction of fractures
open scaling and root planing
open skill
open skull fracture
open spaces
open study
open system
open tuberculosis
open wound
open-angle glaucoma
open-chain movement
open-circuit method
open-circuit nitrogen wash-out
open-circuit spirometry
opening
opening axis
opening contraction
opening movement
opening of aqueduct of midbrain
opening of cerebral aqueduct
opening of coronary sinus
opening of external acoustic meatus
opening of frontal sinus
opening of inferior vena cava
opening of internal acoustic meatus
opening of nasolacrimal duct
opening of pulmonary trunk
opening of superior vena cava
opening of the sphenoidal sinus
opening of uterus
opening of vestibular canaliculus
opening snap
openings of carotid canal
openings of papillary ducts
openings of pulmonary veins
openings of smallest cardiac veins
open-label study
open-packed position
OPERA
operable
opera-glass hand
operant
operant behavior
operant conditioning
operate
operated cleft
operating microscope
operating room
operating room technician
operating table
operation
Operation Restore Trust
operative
operative cholangiography
operative dentistry
operative myxedema
operator
operator gene
opercular
opercular fold
opercular part
operculated
operculitis
operculum
operculum ilei
operon
OPES
opg
OPG
OPG ligand
OPG/CPA
OPGF
OPGL
OPH
Oph A
ophaloenteric duct
ophiasis
Ophidia
ophidiasis
ophidiophobia
ophidism
OPHI-II
O-phosphono-
O-phosphoserine
ophritis
ophryitis
ophryogenes
ophryon
Ophryoscolecidae
ophryosis
ophryospinal angle
OphSeg
Ophth
o-phthalaldehyde
ophthalm-
ophthalmalgia
ophthalmia
ophthalmia neonatorum
ophthalmia nivalis
ophthalmia nodosa
ophthalmic
ophthalmic acid
ophthalmic artery
ophthalmic hyperthyroidism
ophthalmic nerve [CN V1]
ophthalmic ointment