| sand | Particles in siliciclastic sediment that range in size from 0.0625 millimetres (very fine-grained sand) to 2.0 millimetres (very coarse-grained sand), according to the Udden-Wentworth scale. In field geology, to tell the difference between fine-grained sand and coarse silt, the particle in a rock is sand if it can be clearly seen with the naked eye. (09 Oct 1997) |
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| sand bath | In chemistry, an arrangement whereby a substance to be treated is in a vessel protected from the direct action of fire by a layer of sand. (05 Mar 2000) |
| sand bodies | Mineralised body's occurring in the meninges, choroid plexus, and in certain meningiomas; composed usually of a central capillary surrounded by concentric whorls of meningocytes in various stages of hyaline change and mineralization; can also occur in benign and malignant epithelial tumours (often papillary) or with chronic inflammation. Synonym: sand bodies. Synonym: corpora arenacea. Synonym: calcospherite. (05 Mar 2000) |
| sand tumour | <tumour> A firm cellular neoplasm derived from fibrous tissue of the meninges, choroid plexus, and certain other structures associated with the brain, characterised by the formation of multiple, discrete, concentrically laminated, calcareous bodies (psammoma bodies); most of these neoplasms are histologically benign, but may lead to severe symptoms as a result of compressing the brain. Synonym: angiolithic sarcoma, sand tumour, Virchow's psammoma. (05 Mar 2000) |
| sand-crack | A crack or fissure in the hoof of the horse, occurring usually on the inside of the forefoot (quarter-crack) or in the forepart of the hindfoot (toe-crack); when the crack is deep enough to expose the sensitive laminae, or when it extends to the coronary band, lameness results. (05 Mar 2000) |
| sandal | Sandalwood. "Fans of sandal." Source: Websters Dictionary (01 Mar 1998) |
| sandal foot | A wide space between the first and second toes seen in Down's syndrome. (05 Mar 2000) |
| sandal strap dermatitis | Allergic contact on the dorsal surfaces of the feet, caused by synthetic rubber sandal straps or additives to natural rubber. (05 Mar 2000) |
| sandaliform | <botany> Shaped like a sandal or slipper. Origin: Sandal. Source: Websters Dictionary (01 Mar 1998) |
| sandalwood | Origin: F. Sandal, santal, fr. Ar. Candal, or Gr. Santalon; both ultimately fr. Skr. Candana. Cf. Sanders. <botany> The highly perfumed yellowish heartwood of an East Indian and Polynesian tree (Santalum album), and of several other trees of the same genus, as the Hawaiian Santalum Freycinetianum and S. Pyrularium, the Australian S. Latifolium, etc. The name is extended to several other kinds of fragrant wood. Any tree of the genus Santalum, or a tree which yields sandalwood. The red wood of a kind of buckthorn, used in Russia for dyeing leather (Rhamnus Dahuricus). False sandalwood, the fragrant wood of several trees not of the genus Santalum, as Ximenia Americana, Myoporum tenuifolium of Tahiti. Red sandalwood, a heavy, dark red dyewood, being the heartwood of two leguminous trees of India (Pterocarpus santalinus, and Adenanthera pavonina). Synonym: red sanderswood, sanders or saunders, and rubywood. Source: Websters Dictionary (01 Mar 1998) |
| sandalwood oil | A volatile oil distilled from the wood of Santalum album (family Santalaceae), a tree of India; formerly used in subacute bronchitis and in gonorrhoea. Synonym: sandalwood oil. (05 Mar 2000) |
| sandarac | 1. <chemical> Realgar; red sulphide of arsenic. 2. <botany> A white or yellow resin obtained from a Barbary tree (Callitris quadrivalvis or Thuya articulata), and pulverized for pounce; probably so called from a resemblance to the mineral. Origin: L. Sandaraca, Gr. Source: Websters Dictionary (01 Mar 1998) |
| sanderling | <zoology> A small gray and brown sandpiper (Calidris arenaria) very common on sandy beaches in America, Europe, and Asia. Called also curwillet, sand lark, stint, and ruddy plover. Origin: Sand + 0ling. So called because it obtains its food by searching the moist sands of the seashore. Source: Websters Dictionary (01 Mar 1998) |
| sanders | An old name of sandalwood, now applied only to the red sandalwood. See Sandalwood. See: Sandal. Source: Websters Dictionary (01 Mar 1998) |
| sandfish | <zoology> A small marine fish of the Pacific coast of North America (Trichodon trichodon) which buries itself in the sand. Source: Websters Dictionary (01 Mar 1998) |