Medical Dictionary Starting with O

Oat Cell Carcinoma	Another term for small-cell carcinoma
Obesity	The condition of being obese; increased body weight caused b...About more
Obstetrics	Surgical specialty, care of a woman & offspring during pregn...About more
Obstipation	Severe constipation caused by intestinal obstruction
Obstructive Sleep Apnea	The blockage of the airways during sleep, which causes breat...About more
Obturate	With reference to endodontics, refers to the sealing of the ...About more
Obturator	A disc or plate which closes an opening; a prosthesis that c...About more
Occlusal	Pertaining to the biting surfaces of the premolar and molar ...About more
Occlusal Radiograph	An intraoral radiograph made with the film, phosphorous plat...About more
Occlusal Surface	A surface of a posterior tooth or occlusion rim that is inte...About more
Occlusion	The blocking of an opening or passageway in the body
Occlusion of the Ductus	An obstruction or a closure of a passageway or vessel
Occult Blood	Blood in the feces that can be detected only by chemical tes...About more
Occupational	Disease that results directly or indirectly from the patient...About more
Occupational Disease	Industrial Disease; A pathological condition resulting from ...About more
Occupational Therapy	Treatment to relearn physical skills lost as a result of an ...About more
Ocular	Describes something related to the eyes
Oculomotor Nerves	Nerves that stimulate movement of the eyeball
Odontitis	Inflammation of the teeth
Odontogenic	Refers to tooth-forming tissues
Odontogenic Cyst	Cyst derived from the epithelium of odontogenic tissue (deve...About more
Odontoplasty	Adjustment of tooth length, size, and/or shape; includes rem...About more
Oedema	Oedema is a build-up of fluid in the body which causes the a...About more
Off-Label	Use of an FDA-approved drug for an indication other than tha...About more
Olecranon	Proximal bony projection of the ulna at the elbow
Olecranon Bursitis	Inflammation of the olecranon bursa
Olfactory Nerves	Nerves that play a role in the sense of smell
Oligodendroglioma	A rare type of cancerous brain tumor that occurs most common...About more
Oligohydramnios	An unusually small amount of amniotic fluid surrounding the ...About more
Oligospermia	A low level of sperm in the semen
Onchocerciasis	Infection with worms of the genus Onchocerca Human infection...About more
Oncogen	An agent that promotes neoplastic cell growth, or cancer
Oncogenes	Genes that, when altered by environmental factors or viruses...About more
Oncogenesis	The development and growth of cancer

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20000+ Medical & Health Terms for Doctors, students & patients from a medical dictionary. Our experts define difficult medical & health language in easy-to-understand explanations of each and every medical term.

Medical & Health Terms online medical dictionary provides quick & easy access to hard-to-spell and often misspelled medical & health definitions through an extensive alphabetical A- Z listing.

Medical Dictionary Starting with O

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