| Shemin, David | <person> U.S. Biochemist, *1911. See: Shemin cycle. (05 Mar 2000) |
|---|---|
| Shenton's line | A curved line formed by the top of the obturator foramen and the inner side of the neck of the femur, seen on an anteroposterior frontal radiograph of a normal hip joint; it is disturbed in lesions of the joint such as dislocation or fracture. (05 Mar 2000) |
| Shenton, Edward | <person> English radiologist, 1872-1955. See: Shenton's line. (05 Mar 2000) |
| shepard fracture | <radiology> Fracture of the lateral tubercle of the posterior process of the talus (12 Dec 1998) |
| shepherd | 1. A man employed in tending, feeding, and guarding sheep, especially. A flock grazing at large. 2. The pastor of a church; one with the religious guidance of others. <zoology> Shepherd bird, a breed of dogs used largely for the herding and care of sheep. There are several kinds, as the collie, or Scotch shepherd dog, and the English shepherd dog. Called also shepherd's dog. Shepherd dog, a name of Pan. Shepherd kings, the chiefs of a nomadic people who invaded Egypt from the East in the traditional period, and conquered it, at least in part. They were expelled after about five hundred years, and attempts have been made to connect their expulsion with narrative in the book of Exodus. <botany> Shepherd's club, the small teasel. Origin: OE. Schepherde, schephirde, AS. Sceaphyrde; sceap sheep + hyrde, hirde, heorde, a herd, a guardian. See Sheep, and Herd. Source: Websters Dictionary (01 Mar 1998) |
| Shepherd's fracture | A fracture of the external tubercle (posterior process) of the talus, sometimes mistaken for a displacement of the os trigonum. (05 Mar 2000) |
| Shepherd, Francis | <person> Canadian surgeon, 1851-1929. See: Shepherd's fracture. (05 Mar 2000) |
| shepherdess | A woman who tends sheep; hence, a rural lass. "She put herself into the garb of a shepherdess." (Sir P. Sidney) Source: Websters Dictionary (01 Mar 1998) |
| shepherdia | Origin: NL. So called from John Shepherd, an English botanist. <botany> A genus of shrubs having silvery scurfy leaves, and belonging to the same family as Elaeagnus; also, any plant of this genus. See Buffalo berry, under Buffalo. Source: Websters Dictionary (01 Mar 1998) |
| sherbet | 1. A refreshing drink, common in the East, made of the juice of some fruit, diluted, sweetened, and flavored in various ways; as, orange sherbet; lemon sherbet; raspberry sherbet, etc. 2. A flavored water ice. 3. A preparation of bicarbonate of soda, tartaric acid, sugar, etc, variously flavored, for making an effervescing drink; called also sherbet powder. Origin: Ar. Sherbet, shorbet, sharbat, properly, one drink or sip, a draught, beverage, from shariba to drink. Cf. Sorbet, Sirup, Shrub a drink. Source: Websters Dictionary (01 Mar 1998) |
| Sherman unit | Unit of vitamin C, minimum protective dose; the minimum amount of vitamin C which, fed daily, will protect a 300-g guinea pig from scurvy for 90 days; equivalent to 0.5 to 0.6 mg of ascorbic acid. (05 Mar 2000) |
| Sherman, Henry | <person> U.S. Biochemist, 1875-1955. See: Sherman unit, Sherman-Bourquin unit of vitamin B2, Sherman-Munsell unit. (05 Mar 2000) |
| Sherman-Bourquin unit of vitamin B2 | The amount of vitamin B2 required in the diet daily to sustain an average weekly gain of 3 g for 8 weeks in standard test rats; one unit is equivalent to 1 to 7 ug (0.001 to 0.007 mg) of riboflavin, depending on the deficiency diet used in the above assay. (05 Mar 2000) |
| Sherman-Munsell unit | A rat growth unit; the daily amount of vitamin A which sustains a rate of gain amounting to 3 g a week in standard test rats. (05 Mar 2000) |
| Sherrington phenomenon | After the muscles of the leg have been deprived of their motor innervation by sectioning the ventral roots containing fibres for the sciatic nerve, and allowing time for the degeneration of the fibres to occur, stimulation of the sciatic nerve causes slow contraction of the muscles. (05 Mar 2000) |