| obelion | <anatomy> The region of the skull between the two parietal foramina where the closure of the sagittal suture usually begins. Origin: NL, from Gr. A spit. Source: Websters Dictionary (01 Mar 1998) |
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| obelisk | 1. An upright, four-sided pillar, gradually tapering as it rises, and terminating in a pyramid called pyramidion. It is ordinarily monolithic. Egyptian obelisks are commonly covered with hieroglyphic writing from top to bottom. 2. A mark of reference; called also dagger [<dag/] See Dagger. Origin: L. Obeliscus, Gr, dim. Of a spit, a pointed pillar: cf. F. Obelisque. Source: Websters Dictionary (01 Mar 1998) |
| Obermayer | Friedrich, Austrian physician, 1861-1925. See: Obermayer's test. (05 Mar 2000) |
| Obermayer's test | A test for indican; solids in the urine are precipitated by means of a 20% solution of acetate of lead and then filtered, and to the filtrate is added fuming hydrochloric acid containing a small amount of ferric chloride solution; if indican is present, the addition of chloroform causes the formation of indigo, indicated by the blue colour. (05 Mar 2000) |
| Obermeier | Otto H.F., German physician, 1843-1873. See: Obermeier's spirillum. (05 Mar 2000) |
| Obermeier's spirillum | A species causing relapsing fever in South America, Europe, Africa, and Asia; transmitted by the bedbug, Cimex lectularius, and the louse, Pediculus humanus subsp. Humanus. Synonym: Obermeier's spirillum, Spirochaeta obermeieri. (05 Mar 2000) |
| oberon | <medicine> The king of the fairies, and husband of Titania or Queen Mab. Origin: F, fr. OF. Auberon; prob. Of Frankish origin. Source: Websters Dictionary (01 Mar 1998) |
| Obersteiner | H., Austrian neurologist, 1847-1922. See: Obersteiner-Redlich line, Obersteiner-Redlich zone. (05 Mar 2000) |
| Obersteiner-Redlich line | The narrow line along the course of a nerve (or nerve root) where the Schwann cells and connective tissue that support its axons are replaced by glia cells. The zone marks the true boundary between the central and the peripheral nervous system. Usually located at or near the surface of the spinal cord or brainstem, it can extend (e.g., in the eighth nerve) several millimeters out along the nerve. Synonym: Obersteiner-Redlich line. (05 Mar 2000) |
| Obersteiner-Redlich zone | The narrow line along the course of a nerve (or nerve root) where the Schwann cells and connective tissue that support its axons are replaced by glia cells. The zone marks the true boundary between the central and the peripheral nervous system. Usually located at or near the surface of the spinal cord or brainstem, it can extend (e.g., in the eighth nerve) several millimeters out along the nerve. Synonym: Obersteiner-Redlich line. (05 Mar 2000) |
| obese | Excessively fat. Synonym: corpulent. Origin: L. Obesus, fat, partic. Adj., fr. Ob-edo, pp. -esus, to eat away, devour (05 Mar 2000) |
| obesity | <clinical sign> An increase in body weight beyond the limitation of skeletal and physical requirement, as the result of an excessive accumulation of fat in the body. Origin: L. Obesus = fat (18 Nov 1997) |
| obesity index | Body weight divided by body volume. (05 Mar 2000) |
| obesity, morbid | The condition of weighing two, three, or more times the ideal weight, so called because it is associated with many serious and life-threatening disorders. (12 Dec 1998) |
| obesity-related diseases | Obesity increases the risk of developing a number of diseases including: type 2 (adult-onset) diabetes high blood pressure (hypertension) stroke (cerebrovascular accident or cva) heart attack (myocardial infarction or mi) heart failure (congestive heart failure) cancer (only certain forms such as prostate and colon cancer) gallstones and gall bladder disease (cholecystitis) gout and gouty arthritis osteoarthritis (degenerative arthritis) of the knees, hips, and the lower back sleep apnea (failure to breath normally during sleep, lowering blood oxygen) pickwickian syndrome (obesity, red face, underventilation, and drowsiness). (12 Dec 1998) |