| extraction coefficient | The percentage of a substance removed from the blood or plasma in a single passage through a tissue; e.g., the extraction coefficient for p-aminohippuric acid (PAH) in the kidney is the difference between arterial and renal venous plasma PAH concentrations, divided by the arterial plasma PAH concentration. (05 Mar 2000) |
|---|---|
| ultrafiltration coefficient | The filtration coefficient of a semipermeable membrane. (05 Mar 2000) |
| filtration coefficient | A measure of a membrane's permeability to water; specifically, the volume of fluid filtered in unit time through a unit area of membrane per unit pressure difference, taking into account both hydraulic and osmotic pressures. (05 Mar 2000) |
| lethal coefficient | <microbiology> That concentration of disinfectant that kills bacteria at 20-25캜 in the shortest period of time. (05 Mar 2000) |
| linear absorption coefficient | That fraction of ionizing radiation absorbed in a unit thickness of a substance or tissue. See: absorption coefficient. (05 Mar 2000) |
| HIV long-terminal repeat | Regulatory sequences important for viral replication that are located on each end of the HIV genome. The ltr includes the HIV enhancer, promoter, and other sequences. Specific regions in the ltr include the negative regulatory element (nre), nf-kappa b binding sites , sp1 binding sites, tata box, and trans-acting responsive element (tar). The binding of both cellular and viral proteins to these regions regulates HIV transcription. (12 Dec 1998) |
| segment long spacing | <biochemistry> Abnormal packing pattern of collagen molecules formed if ATP is added to acidic collagen solutions, in which lateral aggregates of molecules are produced. Each aggregate is 300 nm long and the molecules are all in register. If segment long spacing aggregates are overlapped with a quarter stagger, the 67 nm banding pattern of normal fibrils is reconstituted. Acronym: SLS (18 Nov 1997) |
| insurance, long-term care | Health insurance to provide full or partial coverage for long-term home care services or for long-term nursing care provided in a residential facility such as a nursing home. (12 Dec 1998) |
| long | 1. Drawn out in a line, or in the direction of length; protracted; extended; as, a long line; opposed to short, and distinguished from broad or wide. 2. Drawn out or extended in time; continued through a considerable tine, or to a great length; as, a long series of events; a long debate; a long drama; a long history; a long book. 3. Slow in passing; causing weariness by length or duration; lingering; as, long hours of watching. 4. Occurring or coming after an extended interval; distant in time; far away. "The we may us reserve both fresh and strong Against the tournament, which is not long." (Spenser) 5. Extended to any specified measure; of a specified length; as, a span long; a yard long; a mile long, that is, extended to the measure of a mile, etc. 6. Far-reaching; extensive. " Long views." 7. Prolonged, or relatively more prolonged, in utterance; said of vowels and syllables. See Short, 13, and Guide to Pronunciation, 22. Long is used as a prefix in a large number of compound adjectives which are mostly of obvious meaning; as, long-armed, long-beaked, long-haired, long-horned, long-necked, long-sleeved, long-tailed, long- worded, etc. In the long run, in the whole course of things taken together; in the ultimate result; eventually. Long clam, to hold stock for a rise in price, or to have a contract under which one can demand stock on or before a certain day at a stipulated price; opposed to short in such phrases as, to be short of stock, to sell short, etc. See Short. To have a long head, to have a farseeing or sagacious mind. Origin: AS. Long, lang; akin to OS, OFries, D, & G. Lang, Icel. Langr, Sw. Lang, Dan. Lang, Goth. Laggs, L.longus. Cf. Length, Ling a fish, Linger, Lunge, Purloin. 1. To a great extent in apace; as, a long drawn out line. 2. To a great extent in time; during a long time. "They that tarry long at the wine." (Prov. Xxiii. 30) "When the trumpet soundeth long." (Ex. Xix. 13) 3. at a point of duration far distant, either prior or posterior; as, not long before; not long after; long before the foundation of Rome; long after the Conquest. 4. Through the whole extent or duration. "The bird of dawning singeth all night long." (Shak) 5. Through an extent of time, more or less; only in question; as, how long will you be gone? Origin: AS. Lance. Source: Websters Dictionary (01 Mar 1998) |
| long abductor muscle of thumb | <anatomy> Origin, interosseous membrane and posterior surfaces of radius and ulna; insertion, lateral side of base of first metacarpal bone; action, abducts and assists in extending thumb; nerve supply, radial. Synonym: musculus abductor pollicis longus, long abductor muscle of thumb, musculus extensor ossis metacarpi pollicis. (05 Mar 2000) |
| long-acting thyroid stimulator | <endocrinology, immunology> A thyroid stimulating antibody which is directed against a receptor for TSH on the thyroid gland. This antibody acts like TSH and stimulates the thyroid to produce excessive amounts of thyroid hormone. The presence of this antibody generally indicates Grave's disease (hyperthyroidism). Acronym: LATS (15 Nov 1997) |
| long adductor muscle | <anatomy, muscle> Origin, symphysis and crest of pubis; insertion, middle third of medial lip of linea aspera of femur; action, adducts, flexes and laterally rotates the thigh; nerve supply, obturator. Synonym: musculus adductor longus, long adductor muscle. (05 Mar 2000) |
| long axis | A line extending through the centre of an object lengthwise; in dentistry, the line extending inciso-(occluso-) cervically parallel to axial surfaces of a tooth. (05 Mar 2000) |
| long axis of body | long axis of body |
| long axis view | In echocardiography, a projection parallel to the interventricular septum of the heart; four-chamber view. (05 Mar 2000) |