| dermal irritation | This is a localised skin reaction resulting from either single or multiple exposure to a physical or chemical agent at the same site. It is characterised by redness and swelling and may be accompanied by local death of skin cells. (09 Oct 1997) |
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| irritation | A state of overexcitation and undue sensitivity. Origin: L. Irritatio (18 Nov 1997) |
| irritation cell | A relatively large, immature cell with certain morphologic features resembling those of a plasma cell, although the nuclear pattern is similar to that of a myeloblast; found in circulating blood only in pathologic conditions. Synonym: irritation cell, Turk's leukocyte. (05 Mar 2000) |
| irritation fibroma | A slow-growing nodule on the oral mucosa, composed of fibrous tissue covered by epithelium, resulting from mechanical irritation by dentures, fillings, cheek biting, etc. (05 Mar 2000) |
| relief | 1. The act of relieving, or the state of being relieved; the removal, or partial removal, of any evil, or of anything oppressive or burdensome, by which some ease is obtained; succor; alleviation; comfort; ease; redress. "He seec the dire contagion spread so fast, That, where it seizes, all relief is vain." (Dryden) 2. Release from a post, or from the performance of duty, by the intervention of others, by discharge, or by relay; as, a relief of a sentry. "For this relief much thanks;;tis bitter cold." (Shak) 3. That which removes or lessenc evil, pain, discomfort, uneasiness, etc.; that which gives succor, aid, or comfort; also, the person who relieves from performance of duty by taking the place of another; a relay. 4. A fine or composition which the heir of a deceased tenant paid to the lord for the privilege of taking up the estate, which, on strict feudal principles, had lapsed or fallen to the lord on the death of the tenant. 5. The projection of a figure above the ground or plane on wwhich it is formed. Relief is of three kinds, namely, high relief (altorilievo), low relief, (basso-rilievo), and demirelief (mezzo-rilievo). See these terms in the Vocabulary. 6. The appearance of projection given by shading, shadow, etc, to any figure. 7. The height to which works are raised above the bottom of the ditch. 8. <physics> The elevations and surface undulations of a country. Relief valve, a valve arranged for relieving pressure of steam, gas, or liquid; an escape valve. Synonym: Alleviation, mitigation, aid, help, succor, assistance, remedy, redress, indemnification. Origin: OE. Relef, F. Relief, properly, a lifting up, a standing out. See Relieve, and cf. Basrelief, Rilievi. Source: Websters Dictionary (01 Mar 1998) |
| relief area | In dentistry, the portion of the denture-bearing area over which the denture base is altered to reduce functional pressure. (05 Mar 2000) |
| relief chamber | A recess in the impression surface of a denture to reduce or eliminate pressure from that specific area of the mouth. (05 Mar 2000) |
| relief work | Assistance, such as money, food, or shelter, given to the needy, aged, or victims of disaster. It is usually granted on a temporary basis. (12 Dec 1998) |
| mucosal relief radiography | Radiographic technique showing fine detail of gastrointestinal mucosa after coating it with a barium suspension and distending the organ with air or gas released from an ingested powder. (05 Mar 2000) |
| accessory organs of the eye | The eyelids, with lashes and eyebrows, lacrimal apparatus, conjunctival sac, and extrinsic muscles of the eyeball. Synonym: organa oculi accessoria, accessory organs, accessory visual apparatus, adnexa oculi, appendages of eye. (05 Mar 2000) |
| accommodation of eye | The increase in thickness and convexity of the eye's lens in order to focus the image of an external object upon the retina. (05 Mar 2000) |
| amaurotic cat's eye | A yellow reflex from the pupil in cases of retinoblastoma or pseudoglioma. (05 Mar 2000) |
| anterior chamber of eye | The space between the cornea anteriorly and the iris/pupil posteriorly, filled with a watery fluid (aqueous humor) and communicating through the pupil with the posterior chamber. Synonym: camera anterior bulbi, camera oculi anterior, camera oculi major. (05 Mar 2000) |
| anterior eye segment | That part of the eyeball anterior to the lens. (12 Dec 1998) |
| antibiotic eye drops | <pharmacology> A medication that is pH balanced to allow placement into the eye for the purpose of killing bacteria. Examples include: Bleph-10, Chloromycetin, Cortisporin-Ophthalmic, Gantrisin, Genoptic, Gentacidin, Garamycin, Gantrisin, Ilotycin, Sodium Sulamyd and Sulphair. (27 Sep 1997) |