Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «O»:
Olive: In neuroanatomy, a rounded oval prominence on the surface of the medulla oblongata in the brain. There are two olives, corresponding to the two olivary bodies, one on each side of the medulla oblongata. Nerve fibers in the olivopontocerebellar pathway connect the olives to the pons and cerebe...
Olive oil diet
Olive oil diet: See: Mediterranean diet....
Oliver Wendell Holmes, Sr.
Oliver Wendell Holmes, Sr.: See: Holmes, Oliver Wendell, Sr....
Olivo-: Pertaining to the olive, a structure in the brain....
Olivopontocerebellar: Pertaining to three particular parts of the brain -- namely, the oliva, the pons, and the cortex of the cerebellum. The oliva (olive) is a rounded prominence on the surface of the medulla oblongata in the brain. The olivopontocerebellar pathway consists of nerve fibers that con...
Olivopontocerebellar atrophy: A group of genetic diseases in which there is progressive degeneration of the olivopontocerebellar pathway in the brain connecting the inferior olive, pons, and cerebellum. The cerebellum is the part of the brain that plays a role in maintaining balance and posture as ...
Ollier disease: A condition characterized by multiple enchondromas -- benign masses of cartilage growing within bones. An enchondroma can deform and shorten a limb and predispose to a fracture at the site. The disorder can be caused by a mutation in the gene for the parathyroid hormone receptor (PTH...
-oma: Suffix meaning a swelling or tumor. Many words in medicine end in -oma. Some examples include adenoma, atheroma, carcinoma, condyloma, fibroma, glaucoma, glioma, granuloma, hemangioma, hematoma, lipoma, lymphoma, melanoma, meningioma, myeloma, neuroblastoma, neuroma, papilloma, retinoblastoma,...
Omega-3 fatty acids
Omega-3 fatty acids: A class of fatty acids found in fish oils, especially from salmon and other cold-water fish, that acts to lower the levels of cholesterol and LDL
(low-density lipoproteins) in the blood. (LDL cholesterol is the "bad" cholesterol.)
EPA (eicosapentaenoic acid) and DHA (docosahex...
Omentectomy: Surgery to remove part or all of the omentum, a fold of the peritoneum (the thin tissue lining the abdomen) that surrounds the stomach and other organs in the abdomen....
Omentum: A sheet of fat that is covered by
peritoneum. The greater omentum is attached to the bottom edge of the
stomach, and hangs down
in front of the intestines. Its other edge is attached to the transverse colon. The lesser omentum is attached to
the top edge of the stomach, and extends to...
Ommaya reservoir: A device implanted under the scalp that is used to
deliver anticancer drugs to the cerebrospinal fluid, the fluid surrounding the brain and spinal cord. The device is named for the U.S. neurosurgeon Ayub Ommaya....
Omniscience: All knowledge. Infinite awareness, understanding, and insight. Someone who (supposedly) possesses omniscience is omniscient. From the Latin "omni-" (all) + "scire" (to know) = to know all.
Medical students and nursing students would do well to recall what Francis Bacon said a while bac...
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Omphalocele: A birth defect in which part of the intestine, covered only by a thin transparent membrane, protrudes outside the abdomen at the umbilicus. The underlying error is a failure during embryonic development for a section of the intestines (the midgut) to return from outside the abdomen and...