| smear culture | A culture obtained by spreading material presumed to be infected on the surface of a solidified medium. (05 Mar 2000) |
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| smear dab | <zoology> The sand fluke . Source: Websters Dictionary (01 Mar 1998) |
| smear layer | Adherent debris produced when cutting the enamel or dentin in cavity preparation. It is about 1 micron thick and its composition reflects the underlying dentin, although different quantities and qualities of smear layer can be produced by the various instrumentation techniques. Its function is presumed to be protective, as it lowers dentin permeability. However, it masks the underlying dentin and interferes with attempts to bond dental material to the dentin. (12 Dec 1998) |
| smeared | <zoology> Having the colour mark ings ill defined, as if rubbed; as, the smeared dagger moth (Apatela oblinita). Source: Websters Dictionary (01 Mar 1998) |
| smeath | <zoology> The smew. Source: Websters Dictionary (01 Mar 1998) |
| smectite | <chemical> A hydrous silicate of alumina, of a greenish colour, which, in certain states of humidity, appears transparent and almost gelatinous. Origin: G. Smectit, fr. Gr. A kind of fuller's earth, fr. To wipe off. Source: Websters Dictionary (01 Mar 1998) |
| smee | <zoology> The pintail duck. The widgeon. The poachard. The smew. Origin: Cf. Smew. Source: Websters Dictionary (01 Mar 1998) |
| smegma | <physiology> The matter secreted by any of the sebaceous glands. Specifically: The soapy substance covering the skin of newborn infants. The cheesy, sebaceous matter which collects between the glans penis and the foreskin. Origin: NL, fr. Gr. Soap, fr. To wash off. Source: Websters Dictionary (01 Mar 1998) |
| smegma clitoridis | The secretion of the apocrine glands of the clitoris, in combination with desquamating epithelial cells. (05 Mar 2000) |
| smegma preputii | Whitish secretion that collects under the prepuce of the foreskin of the penis or of the clitoris; it is comprised chiefly of desquamating epithelial cells. Synonym: sebum preputiale. (05 Mar 2000) |
| smegmalith | A calcareous concretion in the smegma. Origin: smegma + G. Lithos, stone (05 Mar 2000) |
| smell | <physiology> 1. The sense or faculty by which certain qualities of bodies are perceived through the instrumentally of the olfactory nerves. See Sense. 2. The quality of any thing or substance, or emanation therefrom, which affects the olfactory organs; odour; scent; fragrance; perfume; as, the smell of mint. "Breathing the smell of field and grove." (Milton) "That which, above all others, yields the sweetest smell in the air, is the violent." (Bacon) Synonym: Scent, odour, perfume, fragrance. Origin: OE. Smel, smil, smul, smeol. See Smell. Source: Websters Dictionary (01 Mar 1998) |
| smell-brain | Origin: NL, fr. Gr, the nose + the brain. <anatomy> The division of the brain in front of the prosencephalon, consisting of the two olfactory lobes from which the olfactory nerves arise. The term is sometimes used for one of the olfactory lobes, the plural being used for the two taken together. Source: Websters Dictionary (01 Mar 1998) |
| Smellie, William | <person> English obstetrician, 1697-1763. See: Smellie's scissors. (05 Mar 2000) |
| smelling salts | A hydroalcoholic solution containing approximately 2% ammonia and 4% ammonium carbonate and the aromatics: lemon oil, lavender oil, and myristica oil. Used mainly by inhalation to produce reflex stimulation in persons who have fainted or are at risk of syncope. Synonym: sal volatile, smelling salts. (05 Mar 2000) |