| SLS collagen | <protein> 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 SLS aggregates are overlapped with a quarter stagger, the 67 nm banding pattern of normal fibrils is reconstituted. (19 Jan 1998) |
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| Sluder's neuralgia | Neuralgia of the lower half of the face, with pain referred to the root of the nose, upper teeth, eyes, ears, mastoid, and occiput, in association with nasal congestion and rhinorrhoea occurring in infection of the nasal sinuses, and produced by lesions of the sphenopalatine ganglion; ocular hyperaemia and excessive lacrimation may occur. Synonym: Sluder's neuralgia. (05 Mar 2000) |
| sludge | 1. Mud; mire; soft mud; slush. 2. Small floating pieces of ice, or masses of saturated snow. 3. <chemical> See Slime. Sludge hole, the hand-hole, or manhole, in a steam boiler, by means of which sediment can be removed. Origin: CF. Slush. Source: Websters Dictionary (01 Mar 1998) |
| sludged blood | Blood in which the corpuscles, as a result of some general abnormal state, e.g., burns, traumatic shock, and similar stresses, become massed together in the capillaries, and thereby block the vessels or move slowly through them. (05 Mar 2000) |
| slug | 1. A drone; a slow, lazy fellow; a sluggard. 2. A hindrance; an obstruction. 3. <zoology> Any one of numerous species of terrestrial pulmonate mollusks belonging to Limax and several related genera, in which the shell is either small and concealed in the mantle, or altogether wanting. They are closely allied to the land snails. 4. <zoology> Any smooth, soft larva of a sawfly or moth which creeps like a mollusk; as, the pear slug; rose slug. 5. A ship that sails slowly. "His rendezvous for his fleet, and for all slugs to come to, should be between Calais and Dover." (Pepys) 6. [Perhaps a different word] An irregularly shaped piece of metal, used as a missile for a gun. 7. A thick strip of metal less than type high, and as long as the width of a column or a page, used in spacing out pages and to separate display lines, etc. Sea slug. 8. <zoology> Any nudibranch mollusk. A holothurian. Slug caterpillar. Same as Slugworm. Origin: OE. Slugge slothful, sluggen to be slothful; cf. LG. Slukk low-spirited, sad, E. Slack, slouch, D. Slak, slek, a snail. Source: Websters Dictionary (01 Mar 1998) |
| sluggish layer | The layer of the bloodstream in the capillary vessels, next to the wall of the vessel, that flows slowly and transports the white blood cells along the layer wall, while in the centre the flow is rapid and transports the red blood cells. Synonym: plasma layer, Poiseuille's space, sluggish layer. (05 Mar 2000) |
| slugworm | <zoology> Any caterpillar which has the general appearance of a slug, as do those of certain moths belonging to Limacodes and allied genera, and those of certain sawflies. Source: Websters Dictionary (01 Mar 1998) |
| sluice | 1. An artifical passage for water, fitted with a valve or gate, as in a mill stream, for stopping or regulating the flow; also, a water gate of flood gate. 2. Hence, an opening or channel through which anything flows; a source of supply. "Each sluice of affluent fortune opened soon." (Harte) "This home familiarity . . . Opens the sluices of sensibility." (I. Taylor) 3. The stream flowing through a flood gate. 4. <chemical> A long box or trough through which water flows, used for washing auriferous earth. Sluice gate, the sliding gate of a sluice. Origin: OF. Escluse, F. Ecluse, LL. Exclusa, sclusa, from L. Excludere, exclusum, to shut out: cf. D. Sluis sluice, from the Old French. See Exclude. Source: Websters Dictionary (01 Mar 1998) |
| sluiceway | A sluiceway or passage for superfluous water in a reservoir, to prevent too great pressure on the dam. Source: Websters Dictionary (01 Mar 1998) |
| slum | 1. A foul back street of a city, especially one filled with a poor, dirty, degraded, and often vicious population; any low neighborhood or dark retreat; usually in the plural; as, Westminster slums are haunts for theives. 2. <chemical> Same as Slimes. Origin: CF. Slump. Source: Websters Dictionary (01 Mar 1998) |
| slur | 1. A mark or stain; hence, a slight reproach or disgrace; a stigma; a reproachful intimation; an innuendo. "Gaining to his name a lasting slur." 2. A trick played upon a person; an imposition. 3. A mark, thus [<upslur/ or <downslur/], connecting notes that are to be sung to the same syllable, or made in one continued breath of a wind instrument, or with one stroke of a bow; a tie; a sign of legato. 4. In knitting machines, a contrivance for depressing the sinkers successively by passing over them. Source: Websters Dictionary (01 Mar 1998) |
| slurring speech | Slovenly articulation of the more difficult letter sounds. (05 Mar 2000) |
| slurry | A thin semifluid suspension of a solid in a liquid. (05 Mar 2000) |
| slut | 1. An untidy woman; a slattern. "Sluts are good enough to make a sloven's porridge." (Old Proverb) 2. A servant girl; a drudge. "Our little girl Susan is a most admirable slut, and pleases us mightly, doing more service than both the others." (Pepys) 3. A female dog; a bitch. Origin: OE. Slutte; cf. OD. Slodde a slut, Icel. Slottr a heavy, loglike fellow, slota to droop. Source: Websters Dictionary (01 Mar 1998) |
| sluttish | Like a slut; untidy; indecently negligent of cleanliness; disorderly; as, a sluttish woman. "Why is thy lord so slutish, I thee pray." (Chaucer) "An air of liberal, though sluttish, plenty, indicated the wealthy farmer." (Sir W. Scott) Slut"tishly, Slut"tishness. Source: Websters Dictionary (01 Mar 1998) |
| slide |
(slide) (sl[imacr]d) a glass plate on which objects are placed for microscopic examination.
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| sling |
(sling) (sling) 1. a bandage or suspensory for supporting all or part of the body. 2. an anatomical configuration in which a long narrow structure passes underneath another structure and holds it up; it may be normal, anomalous, or surgically-induced.
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| slope |
(slope) (sl[omacr]p) 1. an inclined plane; a surface which is neither horizontal nor vertical. 2. to deviate from the horizontal and from the vertical plane; said of a surface intersecting the horizontal at an angle between 1 and 90 degrees. 3. a mathematical means of expressing the position of a line relative to the horizontal and vertical axes, expressed as the ratio of the change in vertical distance to the change in horizontal distance when the line is traversed.
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| slough |
(slough) (sluf) 1. necrotic tissue in the process of separating from viable portions of the body. 2. to shed or cast off.
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| SLA |
(SLA) abbreviation for L. sacrolaeva anterior (left sacroanterior, a presentation of the fetus).
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| SL | close the slats of (windows) |
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| SL | bar with slats |
| SL | equip with slats |
| SL | (formerly) a writing tablet made of slate |
| SL | a list of candidates to be considered for nomination or election to public offices |
| SL | a fine-grained metamorphic rock that can be split into thin layers |
| SL | thin layers of rock used for roofing |
| SL | choose someone for a job or function |
| SL | cover with slate |
| SL | enter on a list or slate for an election |
| SL | (British) a group of people who save money in a common fund for a specific purpose (usually distributed at Christmas) |
| SL | a pencil of soft slate (or soapstone) used for writing on a slate |