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Medical Dictionary Terms Beginning with O
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Oncogene
Oncogene: A gene that plays a normal role in cell growth and, when altered, may contribute to the growth of a tumor. The word oncogene (literally, cancer gene) is catchy but oversimplifies the complex process of cancer.more detail info...
Oncologist
Oncologist: A doctor who specializes in treating cancer.more detail info...
Onycho- (prefix)
Onycho- (prefix): Having to do with the nails. Examples of medical terms involving "onycho-" include onychodystrophy (abnormal growth and development of nails), onychomycosis (fungal infection of the nails), and onychoosteodysplasia (malformationmore detail info...
Onychodystrophy
Onychodystrophy: Malformation of the nails. Oo-: Prefix meaning egg. Pronounced o'-o.more detail info...
Onychoosteodysplasia
Onychoosteodysplasia: The nail-patella syndrome, an hereditary condition with abnormally formed (dysplastic) or absent nails and absent or underdeveloped (hypoplastic) kneecaps (patellae). Other features include iliac horns, abnormality of the elbows imore detail info...
Oocyte
Oocyte: A female germ cell in the works; a developing egg cell.more detail info...
Oogonium
Oogonium: Ancestral cell that gives rise to oocytes.more detail info...
Oophorectomy
Oophorectomy: The removal of one or both ovaries by surgery.more detail info...
Oophoritis
Oophoritis: Inflammation of the ovary or egg sac.more detail info...
Open fracture
Open fracture: A fracture in which the bone is sticking through the skin. Also called a compound fracture. width="652" height="401---- A fracture is a break in the bone or cartilage. It usually is a result of trauma but can be due to an acquired disemore detail info...
Open reading frame
Open reading frame: (genetics) An open reading frame in DNA has no termination codon, no signal to stop reading the nucleotide sequence, and so may be translated into protein.more detail info...
Operation, Blalock-Taussig
Operation, Blalock-Taussig: Surgical procedure named for the American surgeon Alfred Blalock (1899-1964) and the pediatric cardiologist Helen B. Taussig (1898-1986) who designed the first ôblue-babyö operation to treat children born with a hemore detail info...
Operation, MacewenÆs
Operation, MacewenÆs: Surgical operation for inguinal hernia designed by Sir William Macewen (1848-1924), a surgeon in Glascow, Scotland who also described MacewenÆs sign for the detection of hydrocephalus and brain abscess.more detail info...
Ophthalmia
Ophthalmia: Inflammation of the eye.more detail info...
Ophthalmic
Ophthalmic: Pertaining to the eye. An ophthalmic ointment is designed for the eye.more detail info...
Ophthalmic migraine
Ophthalmic migraine: Migraine involving the eyes but without headache. Migraine, due to a spasm of blood vessels in the brain, usually causes a headache. Flashes of light may appear as jagged lines or "heat waves" in one or both eyes and often lasmore detail info...
Ophthalmologist
Ophthalmologist: An eye doctor. A physician practicing ophthalmology. An ophthalmologist is an M.D.more detail info...
Ophthalmology
Ophthalmology: The art and science of eye medicine.more detail info...
Ophthalmopathy
Ophthalmopathy: Eye disease.more detail info...
Ophthalmoscope
Ophthalmoscope: A lighted instrument used to examine the inside of the eye, including the retina and the optic nerve.more detail info...