| magnet | 1. The loadstone; a species of iron ore (the ferrosoferric or magnetic ore, Fe3O4) which has the property of attracting iron and some of its ores, and, when freely suspended, of pointing to the poles; called also natural magnet. "Dinocrates began to make the arched roof of the temple of Arsinoe all of magnet, or this loadstone." (Holland) "Two magnets, heaven and earth, allure to bliss, The larger loadstone that, the nearer this." (Dryden) 2. <physics> A bar or mass of steel or iron to which the peculiar properties of the loadstone have been imparted; called, in distinction from the loadstone, an artificial magnet. An artificial magnet, produced by the action of a voltaic or electrical battery, is called an electromagnet. <physics> Field magnet, a magnet used for producing and maintaining a magnetic field; used especially of the stationary or exciting magnet of a dynamo or electromotor in distinction from that of the moving portion or armature. Origin: OE. Magnete, OF. Magnete, L. Magnes, -etis, Gr. A magnet, metal that looked like silver, prop, Magnesian stone, fr. Gr, a country in Thessaly. Cf. Magnesia, Manganese. Source: Websters Dictionary (01 Mar 1998) |
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| magnet reaction | A reaction seen in an animal deprived of its cerebellum; when the animal is placed upon its back and the head strongly flexed, the four limbs become flexed in all their joints. Due to stimulation of receptors in the deep layers of the skin, light pressure made upon a toe-pad with the finger causes reflex contraction of the limb extensors; the limb is thus pressed gently against the finger, and when the finger is withdrawn slightly, the experimenter has the sensation that his finger is raising the limb or drawing it out as by a magnet. (05 Mar 2000) |
| magnet reflex | A reaction seen in an animal deprived of its cerebellum; when the animal is placed upon its back and the head strongly flexed, the four limbs become flexed in all their joints. Due to stimulation of receptors in the deep layers of the skin, light pressure made upon a toe-pad with the finger causes reflex contraction of the limb extensors; the limb is thus pressed gently against the finger, and when the finger is withdrawn slightly, the experimenter has the sensation that his finger is raising the limb or drawing it out as by a magnet. (05 Mar 2000) |
| superconducting magnet | A magnet whose coils are cooled, usually with liquid helium, to a temperature at which the metal becomes superconducting, effectively removing all electrical resistance. (05 Mar 2000) |
| bar joint denture | A complete denture that is supported by both soft tissue and natural teeth that have been altered so as to permit the denture to fit over them. The altered teeth may have been fitted with short or long copings, locking devices, or connecting bars. Synonym: bar joint denture, hybrid prosthesis, overdenture, telescopic denture. (05 Mar 2000) |
| partial denture | A dental prosthesis which restores one or more, but less than all, of the natural teeth and/or associated parts and which is supported by the teeth and/or the mucosa; it may be removable or fixed. Synonym: bridgework. Distal extension, a removable partial denture that is retained by natural teeth at one end of the denture base segments only, and in which a portion of the functional load is carried by the residual ridge. (05 Mar 2000) |
| partial denture impression | An impression or negative copy of all or a part of the partially edentulous dental arch or area, made for the purpose of designing or constructing a partial denture. (05 Mar 2000) |
| partial denture retention | The fixation of a removable partial denture by the use of clasps, indirect retainers, or precision attachments. (05 Mar 2000) |
| removable partial denture | A partial denture which supplies teeth and associated structures on a partially edentulous jaw, and which can be readily removed from the mouth. Synonym: removable bridge. (05 Mar 2000) |
| wax model denture | A setup of artificial teeth so fabricated that it may be placed in the patient's mouth to verify esthetics, for the making of records, or for any other operation deemed necessary before final completion of the denture. Synonym: wax model denture. (05 Mar 2000) |
| complete denture | A dental prosthesis which is a substitute for the lost natural dentition and associated structures of the maxillae or mandible. Synonym: full denture. (05 Mar 2000) |
| complete denture impression | An impression of an edentulous arch made for the purpose of constructing a complete denture, a negative registration of the entire denture-bearing, stabilizing area of either the maxillae or mandible, a negative registration of the entire denture foundation and border seal areas present in the edentulous mouth. (05 Mar 2000) |
| provisional denture | A dental prosthesis to be used for a short interval of time for reasons of esthetics, mastication, occlusal support, or convenience, or to condition the patient to accept an artificial substitute for missing natural teeth until more definite prosthetic dental treatment can be provided. Synonym: provisional denture, temporary denture. (05 Mar 2000) |
| stomatitis, denture | Inflammation of the mouth due to denture irritation. (12 Dec 1998) |
| denture | <dentistry> A synthetic replacement for all of your teeth in either your upper or your lower jaw. (08 Jan 1998) |