| shelduck | <zoology> The sheldrake. Alternative forms: shellduck. Origin: Sheld variegated + duck. Source: Websters Dictionary (01 Mar 1998) |
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| shelf | Origin: OE. Shelfe, schelfe, AS. Scylfe; akin to G. Schelfe, Icel. Skjalf. In senses 2 & 3, perhaps a different word (cf. Shelve,). 1. A flat tablet or ledge of any material set horizontally at a distance from the floor, to hold objects of use or ornament. 2. A sand bank in the sea, or a rock, or ledge of rocks, rendering the water shallow, and dangerous to ships. "On the tawny sands and shelves." (Milton) "On the secret shelves with fury cast." (Dryden) 3. <chemical> A stratum lying in a very even manner; a flat, projecting layer of rock. 4. A piece of timber running the whole length of a vessel inside the timberheads. To lay on the shelf, to lay aside as unnecessary or useless; to dismiss; to discard. Source: Websters Dictionary (01 Mar 1998) |
| shelf procedure | Insertion of a graft from the ilium into the roof of the acetabulum for congenital dislocation of the hip. (05 Mar 2000) |
| shell | 1. A hard outside covering, as of a fruit or an animal. Specifically: The covering, or outside part, of a nut; as, a hazelnut shell. A pod. The hard covering of an egg. "Think him as a serpent's egg, . . . And kill him in the shell. <mathematics> " (Shak) Hence, by extension, any mollusks having such a covering. 2. A hollow projectile, of various shapes, adapted for a mortar or a cannon, and containing an explosive substance, ignited with a fuse or by percussion, by means of which the projectile is burst and its fragments scattered. See Bomb. 3. The case which holds the powder, or charge of powder and shot, used with breechloading small arms. 4. Any slight hollow structure; a framework, or exterior structure, regarded as not complete or filled in; as, the shell of a house. 5. A coarse kind of coffin; also, a thin interior coffin inclosed in a more substantial one. 6. An instrument of music, as a lyre, the first lyre having been made, it is said, by drawing strings over a tortoise shell. "When Jubal struck the chorded shell." (Dryden) 7. An engraved copper roller used in print works. 8. The husks of cacao seeds, a decoction of which is often used as a substitute for chocolate, cocoa, etc. 9. The outer frame or case of a block within which the sheaves revolve. 10. A light boat the frame of which is covered with thin wood or with paper; as, a racing shell. Message shell, a bombshell inside of which papers may be put, in order to convey messages. Shell bit, a tool shaped like a gouge, used with a brace in boring wood. See Bit. Shell button. A button made of shell. A hollow button made of two pieces, as of metal, one for the front and the other for the back, often covered with cloth, silk, etc. Shell cameo, a cameo cut in shell instead of stone. Shell flower. <botany> A kind of marl characterised by an abundance of shells, or fragments of shells. Shell meat, food consisting of shellfish, or testaceous mollusks. Shell mound. See Mound. Shell of a boiler, the exterior of a steam boiler, forming a case to contain the water and steam, often inclosing also flues and the furnace; the barrel of a cylindrical, or locomotive, boiler. Shell road, a road of which the surface or bed is made of shells, as oyster shells. Shell sand, minute fragments of shells constituting a considerable part of the seabeach in some places. Origin: OE. Shelle, schelle, AS. Scell, scyll; akin to D. Shel, Icel. Skel, Goth. Skalja a tile, and E. Skill. Cf. Scale of fishes, Shale, Skill. Source: Websters Dictionary (01 Mar 1998) |
| shell nail | Bronchiectasis with excessive longitudinal curvature of the nail plate and atrophy of the nail bed and underlying bone. (05 Mar 2000) |
| shell shock | The World War I name for what is known today as posttraumatic stress, this is a psychological disorder that develops in some individuals who have had major traumatic experiences (and, for example, have been in a serious accident or through a war). The person is typically numb at first but later has symptoms including depression, excessive irritability, guilt (for having survived while others died), recurrent nightmares, flashbacks to the traumatic scene, and overreactions to sudden noises. Posttraumatic stress became known as such in the 70s due to the adjustment problems of some vietnam veterans. (12 Dec 1998) |
| shellac | A resinous excretion of an insect, Laccifer (Tachardia) lacca (family Coccidae). The insects suck the juice of various resiniferous Asiatic (chiefly Indian) trees and excrete and deposit "stick-lac." shellac softens at a low temperature. It has many nonmedicinal uses and is also used to coat confections and tablets and in dental materials, e.g., impression compound and denture base plates. Synonym: lacca. (05 Mar 2000) |
| shellac base | A resinous wafer adapted to maxillary or mandibular casts to form baseplates. (05 Mar 2000) |
| shellapple | <zoology> See Sheldafle. Source: Websters Dictionary (01 Mar 1998) |
| shellbark | <botany> A species of hickory (Carya alba) whose outer bark is loose and peeling; a shagbark; also, its nut. Source: Websters Dictionary (01 Mar 1998) |
| shelled | <zoology> Having a shell. Source: Websters Dictionary (01 Mar 1998) |
| shellfish | <zoology> Any aquatic animal whose external covering consists of a shell, either testaceous, as in oysters, clams, and other mollusks, or crustaceous, as in lobsters and crabs. Source: Websters Dictionary (01 Mar 1998) |
| shelter | 1. That which covers or defends from injury or annoyance; a protection; a screen. "The sick and weak the healing plant shall aid, From storms a shelter, and from heat a shade." (Pope) 2. One who protects; a guardian; a defender. "Thou [God] hast been a shelter for me." (Ps. Lxi. 3) 3. The state of being covered and protected; protection; security. "Who into shelter takes their tender bloom." (Young) Shelter tent,a small tent made of pieces of cotton duck arranged to button together. In field service the soldiers carry the pieces. Synonym: Asylum, refuge, retreat, covert, sanctuary, protection, defense, security. Origin: Cf. OE. Scheltrun, shiltroun, schelltrome, scheldtrome, a guard, squadron, AS. Scildtruma a troop of men with shields; scild shield + truma a band of men. See Shield. Source: Websters Dictionary (01 Mar 1998) |
| sheltered workshops | Protective places of employment for disabled persons which provide training and employment on a temporary or permanent basis. (12 Dec 1998) |
| Shemin cycle | A series of metabolic steps in which glycine is condensed with succinyl-CoA and is then oxidised to CO2 and H2O with regeneration of the succinyl-CoA; important in the synthesis of d-aminolevulinic acid and in the metabolism of red blood cells. Synonym: Shemin cycle. (05 Mar 2000) |
| shear |
The variation (usually the directional derivative) of a vector field along a given direction in space. The most frequent context for this concept is wind shear.
출처: amsglossary.allenpress.com/glossary/browse
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| shear |
1. The sliding of one layer across another, with deformation and fracturing in the direction parallel to the movement. This term usually refers to the forces that cells are subjected to in a bioreactor or a mechanical device used for cell breakage.
출처: www.fao.org/docrep/003/X3910E/X3910E22.htm
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| shedding |
Shedding (of organisms): A term used to describe the release of organisms (bacteria, protozoa, viruses) into the environment from an infected animal. The organisms may be in the stool, urine, respiratory secretions, or vaginal discharges. The 'shedding' animal may or may not be showing symptoms of disease.
출처: www.peteducation.com/dict_alpha_listing.cfm
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| shell |
[shel] a hard, usually calcium-based, outer covering on an animal, such as in snails, clams, and turtles. Sometimes used to refer to the chitinous exoskeleton of arthropods.
출처: members.aol.com/YESedu/glossary.html
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| shear stress |
Shear stress is the result of the force that is generated in a melt to overcome its resistance to a particular flow situation. Shear stress is the product of a material and shear rate.
출처: members.tripod.com/pcbolur/basicprocessterms.html
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| SHE | a bell hung round the neck of a sheep so that the sheep can be easily located |
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| SHE | larvae are parasitic on sheep |
| SHE | a liquid mixture containing pesticides in which sheep are dipped to kill parasites |
| SHE | any of various usually long-haired breeds of dog reared to herd and guard sheep |
| SHE | cultivated for sheep pasturage in upland regions or used as a lawn grass |
| SHE | mostly of Central America |
| SHE | larvae are parasitic on sheep |
| SHE | wingless fly that is an external parasite on sheep and cattle |
| SHE | North American dwarf shrub resembling mountain laurel but having narrower leaves and small red flowers |
| SHE | a pen for sheep |
| SHE | cushion-forming New Zealand herb having leaves densely covered with tawny hairs |
| SHE | perennial prostrate mat-forming herb with hoary woolly foliage |