| cell wall | 1. <cell biology> Extracellular material serving a structural role. 2. <plant biology> In plants the primary wall is pectin rich, the secondary wall mostly composed of cellulose. 3. <microbiology> In bacteria, cell wall structure is complex: the walls of gram-positive and gram-negative bacteria are distinctly different. Removal of the wall leaves a protoplast or spheroplast. (07 Apr 1998) |
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| cell wall skeleton | <chemical> A mucoprotein found in the cell wall of various types of bacteria. It has adjuvant and antitumour activities and has been used to augment the production of lymphokine-activated killer (lak) cells. Pharmacological action: adjuvants, immunologic. (12 Dec 1998) |
| membranous wall of middle ear | The wall formed mainly by the tympanic membrane. Synonym: paries membranaceus cavi tympani, lateral wall of middle ear, membranous wall of middle ear. (05 Mar 2000) |
| membranous wall of trachea | The part of the tracheal wall posteriorly that is not reinforced by tracheal cartilages. Synonym: paries membranaceus tracheae. (05 Mar 2000) |
| chest wall | In respiratory physiology, the total system of structures outside the lungs that move as a part of breathing; it includes the rib cage, diaphragm, abdominal wall, and abdominal contents. Synonym: thoracic wall. (05 Mar 2000) |
| chest wall pain | Chest pain that originates from a noncardiac cause. Chest wall pain typically involves an inflammatory condition of the muscles, bones or joints that comprise the thorax. (27 Sep 1997) |
| ring-wall lesion | A small ring haemorrhage in the brain that stimulates proliferation of a glial ring. (05 Mar 2000) |
| wall | 1. A work or structure of stone, brick, or other materials, raised to some height, and intended for defense or security, solid and permanent inclosing fence, as around a field, a park, a town, etc, also, one of the upright inclosing parts of a building or a room. "The plaster of the wall of the King's palace." (Dan. V. 5) 2. A defense; a rampart; a means of protection; in the plural, fortifications, in general; works for defense. "The waters were a wall unto them on their right hand, and on their left." (Ex. Xiv. 22) "In such a night, Troilus, methinks, mounted the Troyan walls." (Shak) "To rush undaunted to defend the walls." (Dryden) 3. An inclosing part of a receptacle or vessel; as, the walls of a steam-engine cylinder. 4. <chemical> The side of a level or drift. The country rock bounding a vein laterally. (Raymond) Wall is often used adjectively, and also in the formation of compounds, usually of obvious signification; as in wall paper, or wall-paper; wall fruit, or wall-fruit; wallflower, etc. Blank wall, Blind wall, etc. See Blank, Blind, etc. To drive to the wall, to bring to extremities; to push to extremes; to get the advantage of, or mastery over. To go to the wall, to be hard pressed or driven; to be the weaker party; to be pushed to extremes. To take the wall. To take the inner side of a walk, that is, the side next the wall; hence, to take the precedence. "I will take the wall of any man or maid of Montague's." . <botany> Wall barley, a common European solitary wasp (Odynerus parietus) which makes its nest in the crevices of walls. Origin: AS. Weall, from L. Vallum a wall, vallus a stake, pale, palisade; akin to Gr. A nail. Cf. Interval. Source: Websters Dictionary (01 Mar 1998) |
| wall conditioning | <radiobiology> Describes a class of procedures used to control the composition of materials adsorbed onto the walls of a plasma device. Conditioning is important because material from the walls can create impurities in the plasma, and these impurities typically degrade plasma performance. See: boronisation, impurity control, electron cyclotron discharge cleaning. (09 Oct 1997) |
| wall-eye | 1. An eye in which the iris is of a very light gray or whitish colour; said usually of horses. Jonson has defined wall-eye to be "a disease in the crystalline humor of the eye; glaucoma." But glaucoma is not a disease of the crystalline humor, nor is wall-eye a disease at all, but merely a natural blemish. In the north of England, as Brockett states, persons are said to be wall-eyed when the white of the eye is very large and distorted, or on one side. 2. <zoology> An American fresh water food fish (Stizostedion vitreum) having large and prominent eyes; called also glasseye, pike perch, yellow pike, and wall-eyed perch. A California surf fish (Holconotus argenteus). The alewife; called also wall-eyed herring. See: Wall-eyed. Source: Websters Dictionary (01 Mar 1998) |
| wall-eyed | Having an eye of a very light gray or whitish colour. Shakespeare, in using wall-eyed as a term of reproach (as "wall-eyed rage," a "wall-eyed wretch"), alludes probably to the idea of unnatural or distorted vision. See the Note under Wall-eye. It is an eye which is utterly and incurably perverted, an eye that knows no pity. Origin: Icel. Valdeygthr, or vagleygr; fr. Vagl a beam, a beam in the eye (akin to Sw. Vagel a roost, a perch, a sty in the eye) + eygr having eyes (from auga eye). See Eye. Source: Websters Dictionary (01 Mar 1998) |
| wall loading | <radiobiology> Fusion reactor thermal output power divided by the area of the wall facing the plasma. (Neutron wall loading is 4/5 of the total for D-T fusion.) (09 Oct 1997) |
| wall of nail | The fold of skin overlapping the lateral and proximal margins of the nail. Synonym: vallum unguis, wall of nail. (05 Mar 2000) |
| wall-plat | <zoology> The spotted flycatcher. It builds its nest on walls. Source: Websters Dictionary (01 Mar 1998) |
| pneumonia with chest-wall involvement | <radiology> Actinomyces israelii, Nocardia asteroides (12 Dec 1998) |