| silver protein stain | <technique> A silver proteinate complex used in staining nerve fibres, nerve endings, and flagellate protozoa; also used to demonstrate phagocytosis in living animals by the cells of the reticuloendothelial system. (05 Mar 2000) |
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| Silver-Russell dwarfism | <syndrome> A disorder characterised by low birth weight, late closure of the anterior fontanel, bilateral bodily asymmetry, clinodactyly of the fifth fingers, triangular facies, and carp mouth; little useful genetic evidence. Synonym: Silver-Russell dwarfism. (05 Mar 2000) |
| Silver-Russell syndrome | <syndrome> A disorder characterised by low birth weight, late closure of the anterior fontanel, bilateral bodily asymmetry, clinodactyly of the fifth fingers, triangular facies, and carp mouth; little useful genetic evidence. Synonym: Silver-Russell dwarfism. (05 Mar 2000) |
| silver stain | <technique> Any of a variety of stain's (e.g., Bielschowsky's, Gomori's silver, impregnation stain's) which employ alkaline silver nitrate solutions to stain connective tissue fibres (reticulin, collagen), calcium salt deposits, spirochaetes, neurological tissue, and nucleolar organiser regions. (05 Mar 2000) |
| silver staining | The use of silver, usually silver nitrate, as a reagent for producing contrast or colouration in tissue specimens. (12 Dec 1998) |
| silver sulfadiazine | <chemical> Antibacterial used topically in burn therapy. Pharmacological action: anti-infective agents, local. Chemical name: Silver, (4-amino-N-2-pyrimidinylbenzenesulfonamidato-NN,O1)- (12 Dec 1998) |
| silver-tin alloy | Any alloy of silver and tin; commonly 3 parts Ag and 1 part Sn, forming Ag3Sn, the chief intermetallic compound in dental amalgam. (05 Mar 2000) |
| strong silver protein | A compound of sil'ver and protein containing not less than 7.5 and not more than 8.5% of sil'ver; used externally as an antiseptic, devoid of astringent and nearly so of irritant properties. (05 Mar 2000) |
| toughened silver nitrate | Silver nitrate mixed with silver chloride and allowed to dry. Usually applied to the ends of small wooden applicator sticks or made available as pencils. These are used after wetting as a caustic chemical for the removal of warts. Synonym: fused silver nitrate, lunar caustic. (05 Mar 2000) |
| Fontana-Masson silver stain | <technique> A stain used to demonstrate melanin and argentaffin granules. Synonym: Fontana-Masson silver stain. (05 Mar 2000) |
| fused silver nitrate | Silver nitrate mixed with silver chloride and allowed to dry. Usually applied to the ends of small wooden applicator sticks or made available as pencils. These are used after wetting as a caustic chemical for the removal of warts. Synonym: fused silver nitrate, lunar caustic. (05 Mar 2000) |
| Abbe test plate | <equipment> A long, wedge-shaped coverslip about 0.20 mm thick at one end and 0.10 to 0.12 mm at the other end coated chemically with a silver film on which are ruled horizontal lines. at each variation in thickness of 0.01 mm there are vertical lines. By means of oblique illumination and by focusing on different portions of the plate, it is possible to determine the optimum coverslip thickness for any objective and also, for microscopes with drawtubes, the tube length for best objective performance. The approximate freedom from spherical and chromatic aberrations can also be estimated. Small isolated bits of silver near the edges of the lines form good objects for the star test (05 Aug 1998) |
| acetone test | A test for ketonuria; the suspected urine is shaken up with a few drops of sodium nitroprusside, and strong ammonia water is then gently poured over the mixture; if acetone is present, a magenta ring forms at the line of contact; tablets containing sodium nitroprusside and alkali are now more commonly used. (05 Mar 2000) |
| achievement test | A standardised test used to measure acquired learning, e.g., competence in a specific subject area such as reading or arithmetic, in contrast to an intelligence test which is a useful index of potential ability or learning. (05 Mar 2000) |
| acidified serum test | Lysis of the patient's red cells in acidified fresh serum, specific for paroxysmal nocturnal haemoglobinuria. Synonym: Ham's test. (05 Mar 2000) |