| BRM | biological response modifier; biuret reactive material |
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| CRM | Certified Reference Materials; counting rate meter; cross-reacting material; crown-rump measurement |
| ECM | electronic claims management; embryonic chick muscle; erythema chronicum migrans; experimental cereb... |
| EDAM | electron-dense amorphous material |
| EGM | electrogram; extracellular granular material |
| petrosal impression of the pallium | A shallow impression on the inferior surface of the cerebral hemisphere made by the superior margin of the petrous part of the temporal bone. Synonym: impressio petrosa pallii. (05 Mar 2000) |
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| colic impression | <anatomy> A hollow on the visceral surface of the right lobe of the liver anteriorly, corresponding to the situation of the right flexure and beginning of the transverse colon. Synonym: impressio colica. (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) |
| preliminary impression | Primary impression, in dentistry, one made for the purpose of diagnosis or the construction of a tray. (05 Mar 2000) |
| sectional impression | An impression that is made in sections. (05 Mar 2000) |
| suprarenal impression | A hollow on the visceral surface of the right lobe of the liver, adjoining the groove for inferior venae cava, in which lies the right suprarenal gland. Synonym: impressio suprarenalis. (05 Mar 2000) |
| deltoid impression | A rough elevation about the middle of the lateral side of the shaft of the humerus, giving attachment to the deltoid muscle. Synonym: tuberositas deltoidea, deltoid crest, deltoid eminence, deltoid impression. (05 Mar 2000) |
| dental impression materials | Substances or combinations of substances used for making a negative reproduction or impression of the teeth and oral structures for the purpose of producing restorations, prostheses, and dentures, including elastomeric materials, dental plasters, metallic oxide pastes, hydrocolloids, silicone base materials, polyethers, polysulfides, and duplicating compounds. (12 Dec 1998) |
| dental impression technique | Procedure of producing an imprint or negative likeness of the teeth and/or edentulous areas. Impressions are made in plastic material which becomes hardened or set while in contact with the tissue. They are later filled with plaster of paris or artificial stone to produce a facsimile of the oral structures present. Impressions may be made of a full complement of teeth, of areas where some teeth have been removed, or in a mouth from which all teeth have been extracted. (12 Dec 1998) |
| denture impression surface | That portion of the surface of a denture which has its contour determined by the impression; it includes the borders of the denture and extends to the polished surface. (05 Mar 2000) |
| direct bone impression | An impression of denuded bone, used in the construction of subperiosteal denture implants. (05 Mar 2000) |
| duodenal impression | A hollow on the visceral surface of the right lobe of the liver alongside the gallbladder, marking the situation of the duodenum. Synonym: impressio duodenalis. (05 Mar 2000) |
| impression | 1. The act of impressing, or the state of being impressed; the communication of a stamp, mold, style, or character, by external force or by influence. 2. <dentistry> The first step in making a model of your teeth. You bite into a container filled with algenate, and the algenate hardens to produce a mold of your teeth. 3. That which is impressed; stamp; mark; indentation; sensible result of an influence exerted from without. "The stamp and clear impression of good sense." (Cowper) "To shelter us from impressions of weather, we must spin, we must weave, we must build." (Barrow) 4. The pressure of the type on the paper, or the result of such pressure, as regards its appearance; as, a heavy impression; a clear, or a poor, impression; also, a single copy as the result of printing, or the whole edition printed at a given time. "Ten impressions which his books have had." (Dryden) Origin: F. Impression, L. Impressio. (27 Oct 1998) |
| impression area | In dentistry, that surface which is recorded in an impression. (05 Mar 2000) |
| impression compound | A thermoplastic material usually composed of gum damar and prepared chalk, used especially for making dental impressions. Synonym: impression compound, modeling composition, modeling compound. (05 Mar 2000) |